KURT MICHAELS V. RON DAVIS ( 2022 )


Menu:
  •                             FOR PUBLICATION                         FILED
    UNITED STATES COURT OF APPEALS                    OCT 18 2022
    MOLLY C. DWYER, CLERK
    U.S. COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    KURT MICHAELS,                               No.   15-99005
    Petitioner-Appellant,         D.C. No.
    3:04-cv-00122-JAH-JLB
    v.
    RON DAVIS, Acting Warden of San              OPINION
    Quentin State Prison; ATTORNEY
    GENERAL FOR THE STATE OF
    CALIFORNIA,
    Respondents-Appellees.
    Appeal from the United States District Court
    for the Southern District of California
    John A. Houston, District Judge, Presiding
    Argued and Submitted October 25, 2018
    San Francisco, California
    Before: Ronald M. Gould, Marsha S. Berzon, and Carlos T. Bea, Circuit Judges.
    Per Curiam Opinion;
    Partial Majority Opinion by Judge Bea
    Dissent by Judge Berzon
    SUMMARY *
    Habeas Corpus/Death Penalty
    In a per curiam opinion addressing all issues except penalty phase prejudice, and
    a separate majority opinion addressing penalty phase prejudice, the panel affirmed
    the district court’s judgment denying Kurt Michaels’s habeas corpus petition
    challenging his California conviction and death sentence for the 1988 murder of
    JoAnn Clemons.
    Per Curiam Opinion
    Michaels argued that application of the Antiterrorism and Effective Death
    Penalty Act of 1996 (AEDPA), 
    28 U.S.C. § 2254
    (d), is unconstitutionally
    retroactive—i.e., that the relevant event to which AEDPA’s legal consequences
    attached is the automatic appeal of his capital sentence in state court, which occurred
    before AEDPA’s effective date. Rejecting this argument, the panel wrote that
    AEDPA attached new legal consequences to petitions for federal habeas relief, not
    to Michaels’s state court litigation—litigation that was resolved on state law grounds
    and substantive rules of constitutional law, both unaffected by AEDPA.
    Michaels’s Claim Three challenged, under Miranda v. Arizona, 
    384 U.S. 436
    (1966), the admission of his confession at both the guilt and penalty phases of trial,
    on the ground that the confession was elicited after Michaels invoked his rights to
    counsel and silence. The panel wrote that the California Supreme Court’s
    conclusion on direct appeal that Michaels did not unambiguously invoke either his
    right to counsel or his right to silence with respect to all questioning is fully
    supported by the record. The California Supreme Court did recognize that Michaels
    selectively invoked his right not to answer a specific question as protected by
    Miranda, but the California Supreme Court neither determined precisely what
    question Michaels had declared off limits nor whether the ensuing interrogation
    impermissibly violated Michaels’s invocation of his right to silence with regard to
    the subject covered by that question. The panel held that the California Supreme
    Court’s decision to ignore a defendant's unambiguous and unequivocal selective
    *
    This summary constitutes no part of the opinion of the court. It has been
    prepared by court staff for the convenience of the reader.
    invocation of his right to silence as to an area of inquiry during a custodial
    interrogation, requiring instead that the refusal be repeated in response to each
    question regarding the subject matter as to which the right was earlier invoked, was
    contrary to the law clearly established by Miranda and its progeny. The panel
    therefore reviewed de novo the aspects of Michaels’s selective invocation of
    Miranda claim, and held that the detectives’ continued questioning regarding
    Michaels’s role in the murder after Michaels’s selective invocation violated his
    Miranda rights, and that admission of the parts of the interrogation in which
    Michaels confessed to “what happened” was constitutional error. The panel held
    that the Miranda violation was harmless as to the guilt phase because the evidence
    presented at trial showing that Michaels committed capital murder was
    overwhelming even without the confession.
    In Claim Four, Michaels argued that his trial lawyers provided ineffective
    assistance of counsel (IAC) by disclosing to the prosecution a confidential note
    Michaels had handed to his lawyers, during the preliminary hearing, stating that he
    would commit violence against his then-codefendant Popik if Popik was not reseated
    away from Michaels (“the Popik note”). The California Supreme Court held that
    introduction of the Popik note violated the attorney-client privilege but was
    harmless. The panel wrote that this IAC claim—which Michaels did not raise on
    initial state habeas review, as required by California law—was procedurally
    defaulted. The panel therefore addressed whether the procedural default is excused
    under Martinez v. Ryan, 
    566 U.S. 1
     (2012), and held that it is. In so holding, the
    panel wrote: (1) the IAC claim is “substantial” under Martinez because (a) the claim
    clearly has some merit, and (b) Michaels demonstrated a substantial claim of
    prejudice resulting from his trial counsel’s deficient performance; and (2) Michaels
    established “cause” under Martinez because (a) Michaels’s initial post-conviction
    relief (PCR) attorneys’ failure to raise the IAC claim was unconstitutionally
    deficient performance, and (b) there is a reasonable probability the PCR court would
    have granted Michaels relief had his PCR counsel raised the trial counsel IAC claim.
    Because the procedural default of Claim Four is excused, the panel addressed the
    merits of Michaels’s claim that his counsel was constitutionally deficient, as well
    as—on the merits (in the separate majority opinion)—the cumulative effect of
    counsel’s constitutionally deficient performance and Michaels’s improperly
    admitted confession on the sentencing phase of Michaels’s trial. Applying AEDPA
    review, the panel held that there was no reasonable basis for the state court to have
    concluded that Michaels’s trial counsel’s performance was constitutionally adequate
    as to the disclosure of the Popik note. The panel wrote that under clearly established
    law and prevailing standards of representation at the time, counsel’s breach of
    attorney-client confidentiality amounted to constitutionally deficient performance,
    and it was objectively unreasonable for the California Supreme Court to conclude
    otherwise, assuming that it did.
    In Claim Six, Michaels contended that the trial court violated Michaels’s Sixth
    Amendment right to counsel by denying his motion to substitute another attorney
    for appointed attorney Richard Grossberg after an irreconcilable conflict with
    Michaels developed. The panel held that the California Supreme Court reasonably
    concluded that the conflict was the result of Michaels’s subjective distrust, and that
    Michaels’s actions triggered the breakdown of the relationship. The panel held that
    the state court’s other conclusion—that Grossberg rendered constitutionally
    adequate assistance as it relates to the attorney-client conflict claim—was also
    reasonable.
    In Claim Seven, Michaels argued that his other attorney, Mark Chambers,
    provided ineffective assistance when he advised Michaels to proceed pro se after the
    trial court refused to relieve Grossberg. As it turned out, during both the guilt and
    penalty phases, Chambers conducted the trial proceedings. Given that circumstance,
    the panel agreed with the district court that, whether or not Chambers provided
    constitutionally inadequate advice, Michaels did not show that he was prejudiced.
    In Claim Nine, Michaels contended that the trial court erred in not conducting a
    sua sponte competency hearing, and his attorneys were constitutionally ineffective
    for failing to raise the competency issue. The panel held that neither the California
    Supreme Court’s conclusion that the evidence before the trial court was insufficient
    to require a sua sponte competency hearing, nor its rejection of Michaels’s IAC
    competency claim, was unreasonable under AEDPA.
    In Claim Thirteen, Michaels argued that the trial court’s denial of his request for
    a continuance before trial on March 26, 1990, violated his due process rights. Given
    that the standard for determining whether a continuance violates due process affords
    the substantial discretion to a trial court, as well as the deference owed under
    AEDPA, the panel held that the circumstances here do not render the California
    Supreme Court’s decision that denial of the continuance was not a due process
    violation unreasonable.
    Majority Opinion
    Michaels argued that he is entitled to habeas relief because the introduction of his
    confession and the Popik note during the penalty phase of the trial prejudiced him
    by causing the jury to render a death verdict they otherwise would not have in the
    absence of this unconstitutional evidence. Applying the actual prejudice standard
    set forth in Brecht v. Abrahamson, 
    507 U.S. 619
     (1993), the panel held that Michaels
    was not prejudiced by the admission of the confession. The panel explained that
    there is not a single aggravating factor that the jury could have gleaned from
    Michaels's confession evidence that was not otherwise proved by ample admissible
    evidence, nor any piece of mitigation evidence that was rebutted by the confession
    that would otherwise have gone unrebutted; indeed, the confession evidence helped
    support the defense's own theory that Michaels killed Clemons to protect her
    daughter, Christina. Given the limited use of the Popik note and its minimal
    evidentiary value at trial, the panel could not conclude that it had a prejudicial effect
    on the jury, even in combination with the confession evidence. The panel therefore
    rejected Michaels’s claim of cumulative error as to the admission of his confession
    and the Popik note.
    In Claim Five, Michaels contended that the prosecutor committed four species of
    misconduct during the penalty-phase closing arguments. Affirming the denial of
    relief on this claim, the panel held: (1) the prosecutor did not commit misconduct by
    arguing Michaels’s interest in devil-worship to the jury based on his own tackle box
    writings and for the proper purpose of rebutting the mitigating evidence of his church
    membership; (2) there is no clearly established federal law that prohibits the
    rhetorical admission of the defendant’s own views of the suitability of the death
    penalty during the sentencing phase of the trial; (3) isolated comments describing
    Michaels as a “contract killer” did not cross into the proscribed territory of arguing
    that Michaels had committed other murders, and do not constitute the sort of
    egregious misconduct that amount to a denial of constitutional due process; and
    (4) given the context of the entire trial and the deferential standard review required
    under AEDPA, the trial was not rendered fundamentally unfair by the prosecutor’s
    use of name-calling and emotional appeals.
    In Claim Ten, Michaels argued that he is entitled to effective assistance of
    advisory counsel. In Claim Eleven, Michaels argued that Chambers was ineffective
    at both the guilt and penalty phases because Chambers failed to call as a witness
    Christina's father, Wendell, who would have corroborated Christina's testimony
    about how her mother physically abused her. In Claim Twelve, Michaels argued
    that Chambers was ineffective at the penalty phase because Chambers failed
    adequately to investigate and present evidence (1) that Michaels's mother was
    bipolar; (2) that Michaels's mother physically and emotionally abused him
    throughout his childhood; and (3) that Michaels's methamphetamine use was
    affected by his long-term brain damage, difficult background, and mental illness. As
    to Claim Eleven, the panel held that the fact that Chambers admitted that he did not
    consider calling Wendell as a witness does not render the omission per se deficient;
    and that given the limited probative value of Wendell’s testimony, the California
    Supreme Court could have reasonably concluded that the failure to produce such
    testimony was not outside the wide range of professionally competent assistance. As
    to Claim Twelve, the panel held that the California Supreme Court could have
    reasonably found that Chambers was not deficient in failing to inquire further into
    Michaels’s mother’s mental health, that it would not be unreasonable to conclude
    that Chambers’s decision not to investigate further into her abusive conduct was
    reasonable, and that counsel’s decisions concerning drug use and brain damage were
    not unreasonable or deficient. Because Chambers did not render ineffective
    assistance, the panel did not need to decide the threshold question (in Claim Ten)
    whether Michaels had a right to effective assistance of nominally advisory counsel
    where, as here, counsel actually conducted the entire trial, including the penalty
    phase, and made all pertinent decisions.
    Judge Berzon concurred in the per curiam opinion, but dissented from the
    majority opinion with respect to the holding that the admission of Michaels’s
    confession and the Popik note did not cumulatively prejudice the penalty phase of
    the trial. She would hold the introduction of Michaels’s complete improperly
    Mirandized confession and of the Popik note cumulatively prejudiced Michael at the
    penalty phase of his trial, and would therefore grant the petition as to the penalty
    phase. She harbors grave doubt that the harmless error standard is met here, and
    could not conclude that there is no reasonable probability that a single juror might
    have spared Michaels had the confession and the note been excluded at the penalty
    phase.
    COUNSEL
    Benjamin L. Coleman (argued), Coleman & Balogh LLP, San Diego, California;
    Michael R. Belter, Law Office of Michael R. Belter, Monterey, California; for
    Petitioner-Appellant.
    Michael T. Murphy (argued), Deputy Attorney General; Holly D. Wilkens,
    Supervising Deputy Attorney General; Julie L. Garland, Senior Assistant Attorney
    General; Gerald A. Engler, Chief Assistant Attorney General; Kamala D. Harris,
    Attorney General; Attorney General’s Office, California Department of Justice, San
    Diego, California; for Respondents-Appellees.
    PER CURIAM:
    Kurt Michaels was convicted and sentenced to death in California for the
    1988 murder of JoAnn Clemons. On appeal from the district court’s denial of his
    federal habeas petition, Michaels raised sixteen claims, two of which are
    uncertified. Reviewing his appeal under the deferential standards established in the
    Antiterrorism and Effective Death Penalty Act of 1996 (“AEDPA”), see 
    28 U.S.C. § 2254
    (d), we affirm the district court with respect to all claims. This per curiam
    opinion addresses all issues except the penalty phase prejudice. The accompanying
    separate opinion and dissent address penalty phase prejudice.
    I. Background
    A. Murder of JoAnn Clemons
    In the fall of 1988, twenty-two-year-old Kurt Michaels lived in an apartment
    in Oceanside, California, with four roommates. At the time, Michaels was dating
    sixteen-year-old Christina Clemons, then confined at Broad Horizons, an
    adolescent rehabilitation facility. Christina’s mother JoAnn Clemons lived nearby,
    in Escondido.1 Christina testified at trial that she had been physically and sexually
    abused by her mother from an early age. As recently as that September, Christina
    We refer to the victim JoAnn Clemons as “Clemons” and to Christina
    1
    Clemons by her first name.
    1
    said, her mother struck her with a cast iron pan and forced her to engage in digital
    penetration and oral sex.
    While on release from Broad Horizons for the weekend to stay with her
    mother in early September, Christina obtained a key to her mother’s apartment. On
    September 29, Christina was again released from Broad Horizons for the weekend.
    This time, she went to visit Michaels in Oceanside. While there, Christina decided
    that she “wasn’t going to go through it anymore,” and told Michaels that she
    wanted her mother killed. Christina warned Michaels that she would commit
    suicide if Clemons were not killed. Velinda Davis, one of Michaels’s roommates,
    overheard Michaels tell Christina, “Now we can knock off the old lady.”
    According to Davis, Christina replied, “And then we can get the money.” Christina
    gave Michaels her key to Clemons’s apartment.
    The next evening, Michaels asked Mark Hebert, another roommate, if he
    wanted to go to Escondido to do a “tax.” According to Hebert, doing a “tax”
    referred to collecting a debt, usually through the use of force or the threat of force.
    Michaels promised Hebert some of the proceeds of the “tax,” and Hebert agreed to
    participate. Michaels also recruited roommate Darren Popik to come along.
    Michaels told Popik that Clemons had $100,000 in life insurance coverage, which
    would go to Christina, and that these insurance proceeds would help Michaels and
    Christina start a new life. Michaels promised Popik $2,000 to $5,000 from the
    2
    proceeds of Clemons’s life insurance policy, as well as whatever was found in
    Clemons’s apartment. Hebert and Popik arranged for an acquaintance, Joseph
    Paulk, to drive the getaway car after the “tax.”
    On the night of October 1, 2 Michaels and Popik left the Oceanside
    apartment, telling Davis that they were going to “tax” someone. At the last minute,
    Hebert decided not to participate. After Michaels and Popik left, Davis noticed that
    one of her kitchen knives was missing.
    Dennis Crone, Michaels’s former neighbor, testified that Michaels and Popik
    visited him at around 7:30 p.m. Michael Crawford, Dennis Crone’s brother-in-law,
    spent time with Michaels and Popik at Crone’s home and later gave them a ride to
    an intersection about a mile and a half away from Clemons’s apartment building.
    Michaels and Popik stayed outside Clemons’s apartment complex for two or three
    hours, waiting for Clemons to go to sleep. Michaels then used the key Christina
    had given him to enter the apartment; Popik accompanied him. When Michaels
    entered Clemons’s bedroom, he tripped, waking Clemons. Popik initially tried to
    flee, but Michaels prevented him from leaving. Popik then began striking Clemons
    repeatedly in the face, and Michaels stabbed Clemons in the back with a knife,
    2
    Both the California Supreme Court and Michaels’s opening brief
    misidentified the date of the murder as October 3, 1988. See People v. Michaels,
    
    28 Cal. 4th 486
    , 500 (2002). Clemons was in fact murdered in the early hours of
    October 2.
    3
    breaking it. Popik went into the kitchen and brought back another knife. Michaels
    used that knife to cut Clemons’s throat.
    Shortly after midnight, Clemons’s neighbors heard sounds of a struggle
    coming from her apartment and called the police. When officers arrived, a
    neighbor told them that she had earlier seen two men walking toward Clemons’s
    apartment. The officers knocked on the door of Clemons’s apartment while
    Michaels and Popik were still inside, but the two escaped via a balcony. Entering
    the apartment, officers found Clemons’s body in the bedroom. Popik was arrested
    near the apartment complex, but Michaels escaped in the getaway car driven by
    Paulk.
    After leaving the crime scene, Michaels went to Camp Pendleton, a nearby
    Marine base, to visit two acquaintances, Rodney Hatch and Leon Madrid. Michaels
    told Hatch that he had cut a woman’s throat during a robbery; he informed Madrid
    and two other witnesses that he was running from the law and “made a motion
    across [his] throat with his finger” when asked if he killed someone.
    Two weeks later, police arrested Michaels while he was working at a nearby
    carnival. Michaels was interrogated soon after his arrest by detectives Allen and
    Gaylor. Michaels confessed during the interrogation that he had murdered Clemons
    and described the crime in detail. He told interrogators that he had killed Clemons
    “so Christina would not have to go back with her mother.” Michaels eventually
    4
    signed a statement saying that he had killed Clemons so Christina would not be
    forced to live with her mother and “revert to her old habits and problems.” The
    admissibility of large parts of that confession is a major issue in this appeal.
    B. State Trial and Direct Appeal
    Michaels was charged with (1) the capital murder of Clemons with four
    special circumstances (financial gain, lying in wait, robbery, and burglary); (2)
    robbery; and (3) burglary. All three counts alleged the use of a knife and the
    infliction of great bodily injury.
    The trial court initially appointed attorneys James Burns and Charles Duff to
    represent Michaels. Before trial, Burns was relieved due to conflicts with
    Michaels, and Duff was relieved for “personal reasons.” In their place, the trial
    court appointed attorneys Richard Grossberg and Mark Chambers. Soon after the
    new appointments, Michaels filed two motions to remove Grossberg as lead
    counsel, contending that Grossberg was providing ineffective representation, and
    Grossberg moved to be relieved from the case. The trial court denied both motions.
    Michaels, unwilling to work with Grossberg, moved to represent himself. Michaels
    was permitted to proceed pro se, but Chambers and Grossberg remained on the
    scene as advisory counsel. As it turned out, Chambers conducted the entirety of the
    defense case; Grossberg did not participate in the trial. People v. Michaels, 
    28 Cal. 4th 486
    , 521 (2002) (“Michaels I”).
    5
    Michaels’s case proceeded to trial in April 1990. The only contested issues
    at the guilt phase were the degree of the murder, whether Michaels committed
    robbery and burglary, and whether the special circumstances were satisfied.
    Michaels maintained that he had killed Clemons to protect Christina from
    continued sexual and physical abuse by her mother; the prosecution argued that
    Michaels’s motive was stealing Clemons’s property and allowing Christina to
    collect the proceeds of her mother’s life insurance policy. 
    Id. at 501
    . The jury
    convicted Michaels on all counts and found all the alleged special circumstances
    true. 
    Id. at 500
    .
    The prosecution devoted most of the penalty phase to Michaels’s criminal
    history and past misconduct, which included misdemeanor convictions for the theft
    of firearms from a neighbor as a juvenile, illegal possession of weapons,
    threatening Chad Fuller, and participating in the robbery of Chad Fuller, as well as
    multiple arrests. Chad Fuller testified about how Michaels had threatened him with
    a gun on one occasion, and a week or two later had helped two other men rob him.
    Fuller also testified that Michaels had returned much of the stolen property.
    Michaels’s childhood neighbor testified that, as a teenager, Michaels had stolen his
    car and gun but later returned them. A childhood friend testified that, as a teenager,
    Michaels had shown him a revolver. The prosecution played a tape of Michaels’s
    interrogation in full, and also introduced two pieces of paper on which Michaels
    6
    had written lists of names, characterizing each document as a “hit list.” These lists
    were admitted to show that Michaels sought a reputation as a professional killer,
    not that he intended to kill anyone on the lists. Michaels I, 28 Cal 4th. at 534
    In mitigation, Michaels’s sister and mother testified that Michaels’s father
    was a violent alcoholic who beat him and his mother; that he witnessed his father
    sexually molesting his sister when she was young; and that he had attempted
    suicide at age eleven. Michaels’s family moved frequently to avoid his father, but
    his father continued to harass the family, and worse—Michaels’s father tried to run
    over the children with his car and to kidnap them. Christina’s foster mother also
    testified, recounting that she had seen Clemons engage in inappropriate sexual
    behavior with Christina. Finally, Michaels introduced testimony from a clinical
    psychiatrist, who stated that Michaels suffered from major depressive disorder,
    latent schizophrenia, and mixed personality disorder.
    The prosecution’s sole evidence on rebuttal was a note Michaels had handed
    to his lawyers, James Burns and Charles Duff, during the preliminary hearing
    stating that he would commit violence against his then-codefendant Popik if Popik
    was not reseated away from Michaels.
    After penalty phase closing arguments, the jury deliberated for three days
    before returning a death verdict.
    7
    On automatic appeal, the California Supreme Court affirmed Michaels’s
    conviction and sentence. Michaels I, 28 Cal 4th at 542. The United States Supreme
    Court denied certiorari. Michaels v. California, 
    538 U.S. 1058
    , 1058 (2003).
    C. State and Federal Habeas Proceedings
    In 1998, while his direct appeal was pending, Michaels filed a state habeas
    petition with the California Supreme Court. The Court denied that petition in a
    one-page summary order.
    Thereafter, Michaels filed a federal habeas petition in the U.S. District Court
    for the Southern District of California. The district court concluded that several of
    the claims in the petition were unexhausted and granted a stay to allow Michaels to
    exhaust those claims. Michaels then filed a second state habeas petition with the
    California Supreme Court, which was denied in a one-page summary order.
    After exhausting his claims in state court, Michaels filed an amended federal
    habeas petition. In a series of decisions, the district court denied each of Michaels’s
    claims on the merits. It also found that several of Michaels’s claims had been
    procedurally defaulted but did not address whether cause and prejudice existed to
    excuse the defaults, instead addressing the merits of those claims. In February
    2015, the district court entered judgment denying Michaels’s petition on the merits,
    8
    granted a stay of execution, and certified twenty-three issues for appeal. Michaels
    timely appealed, raising fourteen certified and two uncertified issues.3
    II. Standard of Review
    A. The AEDPA Framework
    Michaels filed his federal habeas petition after AEDPA’s effective date, so
    AEDPA deference applies to claims adjudicated on the merits in state court. See
    Lindh v. Murphy, 
    521 U.S. 320
    , 326 (1997). We may grant a habeas petition
    challenging a state conviction only if the state court adjudication:
    (1) resulted in a decision that was contrary to, or involved an
    unreasonable application of, clearly established Federal law, as
    determined by the Supreme Court of the United States; or (2) resulted
    in a decision that was based on an unreasonable determination of the
    facts in light of the evidence presented in the state court proceeding.
    
    28 U.S.C. § 2254
    (d). These standards are “highly deferential” to the state court.
    Davis v. Ayala, 
    576 U.S. 257
    , 269 (2015).
    A state court’s decision is contrary to clearly established federal law if
    its decision contradicts the governing law articulated by the Supreme
    Court or reaches a result different than that reached by the Supreme
    Court on materially indistinguishable facts. See Terry Williams v.
    Taylor, 
    529 U.S. 362
    , 405-06 (2000). A state court’s decision is an
    unreasonable application of clearly established federal law when the
    3
    Michaels raises the two uncertified issues in his opening brief. We construe
    the briefing of those issues as a motion to expand the certificate of appealability,
    U.S. Ct. of App. 9th Cir. R. 22-1(e), but deny certification. The claims referenced
    throughout this opinion are the fourteen certified claims argued in Michaels’s
    briefing.
    9
    state court identifies the correct legal rule, but applies it to a new set of
    facts in a way that is objectively unreasonable. See 
    id. at 407
    .
    Murray v. Schriro, 
    882 F.3d 778
    , 801 (9th Cir. 2018). “[W]e may only hold that a
    state court’s decision was based on an unreasonable determination of the facts if
    ‘we [are] convinced that an appellate panel, applying the normal standards of
    appellate review, could not reasonably conclude that the finding is supported by
    the record.’” Murray v. Schriro, 
    745 F.3d 984
    , 999 (9th Cir. 2014) (quoting Taylor
    v. Maddox, 
    366 F.3d 992
    , 1000 (9th Cir. 2004)). In other words, “[a] state court’s
    determination that a claim lacks merit precludes federal habeas relief so long as
    ‘fairminded jurists could disagree’ on the correctness of the state court’s decision.”
    Harrington v. Richter, 
    562 U.S. 86
    , 101 (2011) (quoting Yarborough v. Alvarado,
    
    541 U.S. 652
    , 664 (2004)). Where the state court adjudicated the merits of a claim
    in a summary decision rather than a reasoned opinion, “the habeas petitioner’s
    burden still must be met by showing there was no reasonable basis for the state
    court to deny relief.” Id. at 98.
    Although AEDPA sets a formidable standard, “[d]eference does not by
    definition preclude relief. A federal court can disagree with a state court’s . . .
    determination and, when guided by AEDPA, conclude the decision was
    unreasonable.” Miller-El v. Cockrell, 
    537 U.S. 322
    , 340 (2003). If the petitioner
    does manage to surmount the hurdles of § 2254, we then resolve the entire claim
    de novo, including any issues the state court did not reach because of the wrong
    10
    turn it took, “without the deference AEDPA otherwise requires.” Liao v. Junious,
    
    817 F.3d 678
    , 688 (9th Cir. 2016) (quoting Panetti v. Quarterman, 
    551 U.S. 930
    ,
    953 (2007)).
    B. Retroactivity of AEDPA
    Michaels first raises a supervening argument—that § 2254(d) should not
    apply to his case at all. 4 He recognizes that § 2254(d) applies as a statutory matter
    but contends that such an application is unconstitutionally retroactive, in violation
    of the Due Process Clause.
    This contention rests on a mistaken understanding of retroactivity. A
    statutory provision’s application is considered retroactive only if “the new
    provision attaches new legal consequences to events completed before its
    enactment.” Landgraf v. USI Film Products, 
    511 U.S. 244
    , 270 (1994); see 
    id. at 269-70
    . Where a federal statute is retroactive in that sense, due process concerns
    arise because the Fifth Amendment’s Due Process Clause “protects the interests in
    fair notice and repose that may be compromised by retroactive legislation.” 
    Id. at 266
    .
    4
    Michaels also contends in passing that 
    28 U.S.C. § 2254
    (e), which limits
    federal court authority to conduct evidentiary hearings, and § 2253, which requires
    federal petitioners to secure a certificate of appealability before proceeding with an
    appeal, are unconstitutionally retroactive as applied to his case. We reject these
    arguments for the same reason we reject his argument regarding § 2254(d).
    11
    Michaels identifies no events completed before the enactment of AEDPA to
    which § 2254 “attach[ed] new legal consequences.” Id. at 270. Michaels argues
    that the relevant “event” to which legal consequences attached is the automatic
    appeal of his capital sentence in state court, which occurred before AEDPA’s
    effective date. But nothing in AEDPA affected the automatic appeal.
    Section 2254(d) “place[d] a new constraint on the power of a federal habeas court
    to grant a state prisoner’s application for a writ of habeas corpus.” Williams v.
    Taylor, 
    529 U.S. 362
    , 412 (2000). The provision attached new legal consequences
    to petitions for federal habeas relief, not to Michaels’s state court litigation. That
    litigation was resolved on state law grounds and substantive rules of constitutional
    law, both unaffected by AEDPA.
    For similar reasons, Michaels’s attempt to analogize his case to Ixcot v.
    Holder, 
    646 F.3d 1202
     (9th Cir. 2011), is unavailing. Ixcot held impermissibly
    retroactive the application of a statute disqualifying immigrants who illegally
    reenter the country from certain forms of discretionary relief. In Ixcot, the
    petitioner had taken affirmative steps to seek such relief before the law’s effective
    date. 
    Id. at 1209-10
    . Michaels’s case is not like Ixcot, as Michaels did not take
    12
    affirmative steps to seek federal habeas relief—the relevant form of relief as to
    which AEDPA created new legal limitations—before AEDPA was enacted.5
    The Supreme Court has unequivocally held that AEDPA applies to federal
    habeas petitions filed after the statute’s effective date, Woodford v. Garceau, 
    538 U.S. 202
    , 205-06 (2003); Lindh, 
    521 U.S. at 326
    , and on numerous occasions has
    applied § 2254(d) to cases in which the state court appeals began prior to that law’s
    enactment. See, e.g., Cullen v. Pinholster, 
    563 U.S. 170
    , 177, 181 (2011); Wiggins
    v. Smith, 
    539 U.S. 510
    , 516, 520 (2003). In this case as well, § 2254(d)
    constitutionally applies to the claims adjudicated on the merits by the state court
    before AEDPA’s effective date.
    III. Admission of Michaels’s Taped Confession
    A. Background
    Detectives Allen and Gaylor interrogated Michaels shortly after his arrest a
    few weeks after the murder. During the two-and-a-half-hour taped interrogation,
    Michaels confessed to murdering Clemons. Claim Three challenges, under
    Miranda v. Arizona, 
    384 U.S. 436
     (1966), the admission of the confession at both
    5
    Although the exhaustion and procedural default doctrines that required
    Michaels to pursue his claims in state court before filing a federal habeas petition
    may have affected Michaels’s state appeal, those doctrines preexisted AEDPA.
    See, e.g., Picard v Connor, 
    404 U.S. 270
    , 275 (1971); Lambrix v. Singletary, 
    520 U.S. 518
    , 522-23 (1997).
    13
    the guilt and penalty phases of trial, on the ground that the confession was elicited
    after Michaels invoked his rights to counsel and to silence. 6
    The detectives’ interrogation of Michaels began as follows: 7
    Allen:        This is Kurt Michaels [defendant]. No middle name.
    Gaylor:       Kurt, what’s your middle name? None.
    Michaels:     Legal [name is] changed for the third time.
    Gaylor:       Where does your family live, Kurt?
    Michaels:     Who knows honestly? I wish I knew or I’d be with them
    now. I’d be able to get the other pictures in my other coat.
    Gaylor:       Well, I’ll tell you. I’ve been doing this for about twelve
    years. John’s been doing this for about thirteen years, here.
    And a couple of years with the San Diego Police before
    that. And a few years with the Highway Patrol before that.
    And if there’s one thing we know, it’s that there’s always
    more than one side to every story. So what we want to do
    is provide you with an opportunity to tell your side of the
    story, because this last two weeks, we’ve been talking with
    a lot of different people and have gotten a lot of different
    information from different people.
    Michaels:     You found out I am a mental case. (Laughter.)
    Gaylor:       So, now it’s your turn to tell your side of the story.
    Okay? Also, if you have any questions, it will be your
    opportunity to ask them, all right? Before we do that,
    though, I want to read you your rights. [Reads standard
    6
    Claim Two argues that we should first adjudicate each of Michaels’s
    claims on the merits and remand to the district court if there is a question regarding
    procedural default. As will become clear once we address all the claims, remand
    for such a determination is unnecessary.
    7
    Except the italicizations, all alterations noted appear in the original
    transcript.
    14
    Miranda warnings.] Do you understand each of these
    rights I’ve explained to you? (Defendant nods his head
    yes.) Is that yes?
    Michaels:   Yes.
    Gaylor:     Okay. Having in mind and understanding your rights as
    I’ve told you, are you willing to talk with us?
    Michaels:   Sure. No problem.
    Gaylor:     Do you know why you’re here?
    Michaels:   Yes.
    Gaylor:     Tell me, in your own words.
    Michaels:   Murder.
    Gaylor:     Murder of who?
    Michaels:   Murder of JoAnn Clemons.
    Gaylor:     Well, what’s your side of the story? What happened?
    Michaels:   I don’t know if I should without an attorney. (Laughter.)
    It ain’t going to do me no . . . . (Laughter.)
    Allen:      Well, we need to know. Let’s put it this way, Kurt. He
    just advised you of your rights. And you said, that yeah,
    you wanted to talk to us. There’s no problem. If at any
    time that you do not want to talk with us, you can stop at
    any particular time. If there’s any time that we ask you a
    question that you don’t want to answer, you can stop at
    any time.
    Michaels:   Okay, that one. (Laughter.)
    Allen:      Well, what I’m saying is that we just want to make sure
    you understand all those things.
    Michaels:   Okay, I appreciate it.
    15
    Allen:        And the other thing that Chuck said was we have uh
    pretty much understand what the story is and we like to
    going to give you your opportunity.
    Michaels I, 28 Cal 4th. at 508-09.
    Following this exchange and additional questioning by the interrogators,
    Michaels proceeded to confess in detail to his involvement in the homicide. He
    revealed that he enlisted Popik for the murder, and that the two of them waited
    outside Clemons’s apartment for her to go to sleep. Michaels stated that after they
    entered the apartment, Clemons woke up, Popik physically beat her, and “I cut her
    throat.” Michaels told interrogators that he killed Clemons “so Christina would not
    have to go back with her mother.” Michaels also made statements suggesting that
    he had killed “more than twenty” people.
    Detective Allen was skeptical of Michaels’s remarks about his other
    murders, stating “I think you’re making this up.” Later, Detective Allen asked,
    “[s]o a lot of this is what you’re telling us has to do with you and your reputation
    on the street is not really true?” Michaels answered, “right . . . I have to keep that
    story alive.” No evidence was presented at trial indicating that Michaels had
    committed any other homicide.
    In the guilt phase, the trial court admitted the portions of the interrogation in
    which Michaels confessed to his role in the Clemons murder but excluded his
    comments about committing other murders. In the penalty phase, though, the trial
    16
    court admitted the entire taped interrogation. The jury was specially instructed that
    Michaels’s comments about other killings were to be considered only as proof of
    his mental state in connection with the charged murder, not for their truth. After
    hearing the taped interrogation and the other evidence presented, the jury
    sentenced Michaels to death.
    B. Miranda
    Miranda v. Arizona established the bedrock Fifth Amendment principle that
    a court cannot admit statements obtained during the custodial interrogation of a
    suspect unless certain procedural safeguards are met. 
    384 U.S. at 444
    . Those
    safeguards include informing the suspect of his rights to remain silent and to
    receive assistance of counsel before any questioning. 
    Id.
     Any waiver of those
    rights must be voluntary, knowing, and intelligent. 
    Id.
     Recognizing that “the
    authorities through badgering or overreaching—explicit or subtle, deliberate or
    unintentional—might otherwise wear down the accused,” Smith v. Illinois, 
    469 U.S. 91
    , 98 (1984) (quotations and alterations omitted), the Supreme Court clearly
    established a bright line safeguard: If a suspect “indicates in any manner, at any
    time prior to or during questioning, that he wishes to remain silent,” officers must
    cease the interrogation. Miranda, 
    384 U.S. at 473-74
    . The Court later clarified that
    an invocation of a suspect’s Miranda rights must be “unambiguous.” Davis v.
    United States, 
    512 U.S. 452
    , 459 (1994); see infra pp. 21-22.
    17
    Any unambiguous invocation of the right to remain silent must be
    “scrupulously honored.” Michigan v. Mosley, 
    423 U.S. 96
    , 104 (1975) (quoting
    Miranda, 348 U.S. at 479). Miranda elaborated on the consequences of failing to
    respect a suspect’s invocation, explaining that a proper waiver was a
    “prerequisite[] to the admissibility of any statement made by a defendant.”
    Miranda, 
    384 U.S. at 476
    .
    It is also clearly established that just as a suspect in custody may refuse to
    answer all questions, he may selectively exercise his Miranda rights to silence and
    to counsel. The purpose of Miranda’s prophylactic protections is to “counteract[]
    the coercive pressures of the custodial setting,” Mosley, 
    423 U.S. at 104
    , by
    “giving the defendant the power to exert some control over the course of the
    interrogation,” Moran v. Burbine, 
    475 U.S. 412
    , 426 (1986) (emphasis in original).
    “The mere fact that [a suspect] may have answered some questions or volunteered
    some statements on his own does not deprive him of the right to refrain from
    answering any further inquiries.” Miranda, 
    384 U.S. at 445
    .
    After Miranda, Michigan v. Mosley considered how these principles apply in
    practice—specifically, whether suppression of a defendant’s homicide confession
    during an interrogation was required after he had refused to answer questions about
    unrelated robberies in a previous interrogation. 
    423 U.S. at 104
    . Mosley first
    explained that “[t]hrough the exercise of his option to terminate questioning[, a
    18
    suspect] can control the time at which questioning occurs, the subjects discussed,
    and the duration of the interrogation.” 
    Id. at 103-04
    . Mosley then held that the
    defendant had selectively invoked his right to cut off questioning regarding the
    robberies. But, Mosley held, the defendant’s confession to the homicide was
    admissible because the confession was unrelated to the robberies, and the
    defendant had not invoked his right to silence as to the homicide. 
    Id. at 105
    .
    Connecticut v. Barrett, 
    479 U.S. 523
     (1987), confirmed that selective
    invocations of Miranda rights must be honored. Barrett concerned the right to
    counsel. But “[t]here is no principled reason to adopt different standards for
    determining when an accused has invoked the Miranda right to remain silent and
    the Miranda right to counsel . . . .” Berghuis v. Thompkins, 
    560 U.S. 370
    , 381
    (2010).
    Barrett involved a defendant who provided an oral confession after stating
    that “he would not give the police any written statements [without counsel] but had
    no problem in talking about the incident.”
    479 U.S. at 525
    . The Court held that the
    defendant’s refusal to provide a written statement constituted a “limited invocation
    of the right to counsel,” 
    id. at 530
    , which triggered constitutional protections: “It is
    undisputed that [the defendant] desired the presence of counsel before making a
    written statement. Had the police obtained such a statement without meeting the
    waiver standards of Edwards, it would clearly be inadmissible.” 
    Id. at 529
    . The
    19
    invocation of the right to counsel with regard to a written statement did not,
    however, affect the admissibility of the oral confession, as to which the defendant
    had voluntarily announced his willingness to speak with authorities without
    counsel. 
    Id.
    Mosley and Barrett clearly established that when a suspect selectively
    invokes his right to silence or to counsel, Miranda requires interrogation to end
    with respect to the subject matter or mode of reply as to which the suspect invoked
    the right. See Mosley, 
    423 U.S. at 103-04
    ; Miranda, 
    384 U.S. at 473-74
    . We so
    recognized in Arnold v. Runnels, concluding that “[a]ny reasonable application of
    the law must begin by recognizing that [the defendant] clearly and unequivocally
    invoked his Miranda rights selectively.”8 
    421 F.3d 859
    , 864 (9th Cir. 2005) (citing
    Mosley, 
    423 U.S. at 103-04
    ; Barrett, 
    479 U.S. at 529
    ). Arnold went on to hold,
    under deferential AEDPA review, that admission of the defendant’s taped
    interview was unconstitutional because he had selectively invoked his right to
    silence as to audio-recorded statements. Id. at 866.9
    8
    Under AEDPA review, “an appellate panel may, in accordance with its
    usual law-of-the-circuit procedures, look to circuit precedent to ascertain whether it
    has already held that the particular point in issue is clearly established by Supreme
    Court precedent.” Marshall v. Rodgers, 
    569 U.S. 58
    , 64 (2013).
    9
    This Court’s decision in United States v. Garcia-Morales, 
    942 F.3d 474
    (9th Cir. 2019), has no bearing on this case. Garcia-Morales held that the district
    court did not err in admitting an exchange between Garcia-Morales and an
    20
    That an individual in custody can selectively invoke his Miranda rights does
    not obviate the requirement that a suspect must invoke any Miranda right
    unambiguously and unequivocally to trigger its protection. See Berghuis, 
    560 U.S. at 381-82
    ; Davis, 
    512 U.S. at 459
    . More specifically, the relevant clearly
    established Supreme Court law is as follows:
    First, an unambiguous and unequivocal Miranda invocation “cuts off”
    questioning—even questioning intended to clarify that the accused is invoking
    his Miranda rights. See Berghuis, 
    560 U.S. at 382
     (explaining that if the
    accused makes a “simple” statement that he wants to remain silent, he invokes
    “his right to cut off questioning” (internal quotation marks omitted)); Smith,
    
    469 U.S. at 98
     (“Where nothing about the request for counsel or the
    circumstances leading up to the request would render it ambiguous, all
    questioning must cease.”). Second, an ambiguous or equivocal Miranda
    invocation “do[es] not require the cessation of questioning.” Davis, 
    512 U.S. at 459
    . Finally, in determining whether a request is ambiguous or equivocal,
    the court must apply an objective inquiry: “Although a suspect need not speak
    with the discrimination of an Oxford don, he must articulate his desire to have
    counsel present [or to remain silent] sufficiently clearly that a reasonable
    police officer in the circumstances would understand the statement to be a
    request for an attorney.” 
    Id.
     (internal quotation marks and citation omitted).
    interrogating police officer which “demonstrated that Garcia did not want to
    discuss his co-conspirators on video tape,” because the exchange did not constitute
    a selective invocation of Garcia-Morales’s right to remain silent. 942 F.3d at 476-
    77. Garcia-Morales never made any statements regarding his co-conspirators, the
    subject he had allegedly invoked his right not to answer questions about. Instead,
    Garcia-Morales argued that admission at trial of the alleged invocation itself was
    plain error, relying on Doyle v. Ohio, 
    426 U.S. 610
    , 617-19 (1976), and its
    progeny, which hold that the prosecution violates due process in eliciting
    testimony about a suspect’s silence. 942 F.3d at 476. In this case, Michaels was not
    harmed by the admission of his invocation (“okay, that one”), but by the admission
    of the testimony regarding the subject as to which he invoked his right to remain
    silent (“what happened”). Garcia-Morales is therefore inapt.
    21
    Garcia v. Long, 
    808 F.3d 771
    , 778 (9th Cir. 2015).
    C. AEDPA Review of State Court Decision
    On direct appeal, the California Supreme Court held that the interrogating
    officers did not violate Michaels’s right to counsel or his right to silence with
    respect to all questioning because Michaels did not unequivocally invoke either
    right. Michaels I, 
    28 Cal. 4th at 510-11
    . The full analysis of the issue was as
    follows:
    Defendant’s statement, “Okay, that one” implies a refusal to answer a
    particular question, perhaps Detective Gaylor’s question asking defendant:
    “[W]hat’s your side of the story? What happened?” Defendant did not assert
    a right to refuse to answer any questions, ask that the questioning come to a
    halt, or request counsel. Instead, he was showing that he knew he could refuse
    to answer any or all questions and would exercise this right on a question-by-
    question basis. From time to time in the interrogation he did refuse to answer
    specific questions. But the words defendant used, and his subsequent conduct,
    do not show that he wanted to stop the interrogation and bar all further
    questions.
    The case is analogous to People v. Silva, 
    45 Cal.3d 604
     (1988). There, the
    defendant waived Miranda rights and answered several questions, then
    refused to answer a question that might place him at the site where the murder
    victim was kidnapped. The interrogation continued, with the defendant
    answering some questions and not others. We concluded that the defendant’s
    constitutional rights were not violated, because “[a] defendant may indicate
    an unwillingness to discuss certain subjects without manifesting a desire to
    terminate ‘an interrogation already in progress.’” 
    Id. at 629-630
    . The same is
    true here.
    Michaels I, 
    28 Cal. 4th at 510-11
     (emphasis added) (alterations in original).
    22
    The state court’s conclusion that Michaels did not unambiguously invoke
    either his right to counsel or his right to silence with respect to all questioning is
    fully supported by the record. See 
    id. at 510
    .
    First, Michaels’s statement “I don’t know if I should without an attorney” is
    ambiguous under Davis v. United States, 
    512 U.S. 452
     (1994). Davis held that the
    statement “[m]aybe I should talk to a lawyer” did not constitute an unambiguous
    request for counsel. 
    Id. at 462
    . Similarly, Michaels did not unambiguously invoke
    his right to counsel when he equivocated about whether he should speak without a
    lawyer present.
    Second, Michaels never requested that all questioning come to a halt. In
    response to an interrogating officer informing him that he could choose to stop
    answering any question at any time, Michaels stated, “Okay, that one.” That
    response cannot reasonably be interpreted to be a general refusal to answer
    questions. The term “that” refers to “a fact, act, or occurrence, or a statement or
    question, implied or contained in the previous sentence.” That, Oxford English
    Dictionary (2d ed. 1989) (emphasis added). So the pronoun “that” in context
    referred to a specific inquiry, not to all inquiries.
    At the same time, the California Supreme Court recognized that Michaels
    did invoke the selective right to silence protected by Miranda. Michaels I held that
    “[d]efendant’s statement, ‘Okay, that one’ implies a refusal to answer a particular
    23
    question, perhaps Detective Gaylor’s question asking defendant: ‘[W]hat’s your
    side of the story? What happened?’” 
    28 Cal. 4th at 510
     (alterations in original).
    Michaels I reasoned further that Michaels’s “case is analogous to People v. Silva,
    [
    45 Cal. 3d 604
     (1988)]” which involved a defendant who refused to answer a
    specific question during his interrogation. Michaels I, 
    28 Cal. 4th at 510
    . Quoting
    the holding in Silva—“[a] defendant may indicate an unwillingness to discuss
    certain subjects without manifesting a desire to terminate ‘an interrogation already
    in progress,’” 
    45 Cal. 3d at 629
     (citation omitted)—Michaels I concluded, “[t]he
    same is true here.” 
    28 Cal. 4th at 511
    . 10 By equating Michaels’s case to Silva,
    Michaels I confirmed that it considered Michaels’s statement to be a refusal to
    answer a particular question.
    Despite its correct premise that Michaels had selectively invoked his right
    not to answer a specific question, Michaels I stopped there. It neither determined
    precisely what question Michaels had declared off limits nor whether the ensuing
    interrogation impermissibly violated Michaels’s invocation of his right to silence
    with regard to the subject covered by that question. Yet, as Miranda and the
    ensuing precedents clearly establish, when a suspect unequivocally invokes his
    10
    We note that the officers in Silva respected the suspect’s selective
    invocation and “asked questions involving areas other than the [subject of the
    invocation].” 
    45 Cal. 3d at 629
    . In contrast, the officers in this case ignored
    Michaels’s selective invocation and continued to ask him about the murder.
    24
    Miranda rights “the interrogation must cease.” Miranda, 
    384 U.S. at 474
    . In the
    context of selective invocation of the Miranda right to silence, the cessation
    requirement means that police officers cannot continue to ask about the same
    subject the suspect said he did not want to talk about. Michaels I did not so
    recognize.
    Instead, Michaels I indicated that Michaels had to invoke his selective right
    to silence “on a question-by-question basis,” even if he had previously declared a
    subject matter off limits by declining to answer a broad question about it. 
    28 Cal. 4th at 510
    . Michaels I’s decision to ignore a defendant’s unambiguous and
    unequivocal selective invocation of his right to silence as to an area of inquiry
    during a custodial interrogation, requiring instead that the refusal be repeated in
    response to each question regarding the subject matter as to which the right was
    earlier invoked, was contrary to the law clearly established by Miranda and its
    progeny. See Mosley, 
    423 U.S. at 103-04
    ; Miranda, 
    384 U.S. at 473-74
    .
    D. De Novo Review of Michaels’s Miranda Claim
    Because the California Supreme Court’s decision rested on an application of
    Miranda contrary to clearly established federal law, we review de novo the aspects
    of Michaels’s selective invocation of Miranda claim. See Panetti, 
    551 U.S. at 953
    .
    Michaels I’s conclusion that Michaels selectively invoked his right to silence
    is correct. Michaels I held that “[d]efendant’s statement, ‘Okay, that one’ implies a
    25
    refusal to answer a particular question, perhaps Detective Gaylor’s question asking
    defendant: ‘[W]hat’s your side of the story? What happened?’” 
    28 Cal. 4th at 510
    (alterations in original). Although Michaels I used the word “perhaps,” once one
    recognizes—as Michaels I does—that he was refusing to answer some question,
    the last preceding questions “What’s your side of the story? What happened?” are
    the only possible questions to which Michaels could have been referring.
    “In light of clear Supreme Court precedent, we have recognized the
    importance of evaluating a suspect’s in-custody statements as a whole.” Sessoms v.
    Grounds, 
    776 F.3d 615
    , 627 (9th Cir. 2015) (en banc). In context, the phrase
    “Okay, that one” is susceptible to only one reasonable interpretation, as an
    unambiguous invocation of the right that he was just informed of—to “stop
    [talking] at any particular time” —with respect to the last question he was asked:
    “Well, what’s your side of the story? What happened?” This question was the only
    substantive question, and the last question, asked. By selectively invoking his right
    to remain silent in response to this broad question, Michaels stated that he did not
    want to discuss “what happened” with regard to the murder. Although Michaels
    did not repeat the question in his own words, the reference is clear.
    Michaels did go on to answer questions regarding the subject he had
    declared off-limits—his version of how the murder occurred. But “an accused’s
    postrequest [sic] responses to further interrogation may not be used to cast doubt
    26
    on the clarity of his initial request for counsel.” Smith, 
    469 U.S. at 92
     (emphasis
    added); see also Garcia, 
    808 F.3d at 778
    . Thus, Michaels’s subsequent answers to
    detectives’ questions cannot undermine his otherwise unambiguous invocation of
    his right to silence, contrary to Michaels I’s analysis. 
    28 Cal. 4th at 510-11
    .
    Following Michaels’s unambiguous, unequivocal invocation of his selective
    right to silence, the interrogating officers should have ceased asking him about
    “What’s your side of the story? What happened?” See Miranda, 
    384 U.S. at
    473-
    74. In Mosley, for example, an invocation of a right to silence was “scrupulously
    honored” when police “immediately ceased the interrogation” and “restricted the
    second interrogation to a crime that had not been a subject of the earlier
    interrogation.” 
    423 U.S. at 104, 106
    . Here, however, Detective Allen ignored
    Michaels’s invocation and proceeded along precisely the same line of questioning:
    “We’re like going to give you your opportunity . . . to understand your side of the
    story.” The detectives then continued to ask Michaels questions about “his story”
    regarding the murder and the events leading up to it. After a battery of questions,
    Michaels eventually confessed that he planned to murder Clemons and that he
    stabbed her to death on October 2, 1988.
    Admission at trial of the parts of the taped interrogation that did not relate to
    Michaels’s involvement in the murder—his comments about killing others, for
    example, and the discussion of his relationship with Christina—did not violate
    27
    Miranda, as Michaels did not unambiguously invoke his rights to silence or to
    counsel with respect to all questioning. But the detectives’ continued questioning
    regarding Michaels’s role in the murder after Michaels’s selective invocation did
    violate his Miranda rights. Admission of the parts of the interrogation in which
    Michaels confessed to “what happened,” was constitutional error.
    E. Harmless Error
    Admission of evidence in violation of Miranda requires reversal of a
    defendant’s conviction and sentence only if the error likely had a “substantial and
    injurious effect or influence in determining the jury’s verdict.” Sessoms, 776 F.3d
    at 629 (quoting Brecht v. Abrahamson, 
    507 U.S. 619
    , 637 (1993)). “If, reviewing
    the facts as a whole, we are able to determine with fair assurance that the judgment
    was not substantially swayed by the error, we may conclude that the error was
    harmless. Otherwise, we must conclude that the petitioner’s rights were
    substantially and injuriously affected.” Hurd v. Terhune, 
    619 F.3d 1080
    , 1090 (9th
    Cir. 2010) (citation omitted). Because it held there was no Miranda violation, the
    California Supreme Court made no determination as to whether any such error was
    harmless. So we review this element of Michaels’s claim de novo. See Porter v.
    McCollum, 
    558 U.S. 30
    , 39 (2009) (per curiam).
    Ordinarily, a defendant’s own confession is “the most probative and
    damaging evidence that can be admitted against him.” Arizona v. Fulminante, 499
    
    28 U.S. 279
    , 296 (1991) (quotation marks omitted). When the jury considers a full
    confession, there is a high probability that it will rely on the confession alone in
    rendering its decision. 
    Id.
     An erroneously admitted confession “will seldom be
    harmless.” United States v. Williams, 
    435 F.3d 1148
    , 1162 (9th Cir. 2006) (citing
    Fulminante, 499 U.S. at 296).
    But seldom does not mean never. In this case, the evidence presented at trial
    showing that Michaels committed capital murder was overwhelming even without
    the confession. The Miranda violation was therefore harmless as to the guilt phase.
    The separate opinions in this case address harmlessness under Brecht during the
    penalty phase.
    1. Guilt Phase
    At the guilt phase of Michaels’s trial, a mountain of witness testimony aside
    from the taped confession indicated that Michaels had committed capital murder.
    First, three of Michaels’s roommates who spent time with him less than forty-eight
    hours before the murder testified either that Michaels directly told them about his
    plans to kill Clemons or that they overheard Michaels speak about his plans do so.
    Roommate Mark Hebert testified that Michaels had asked him to help “tax”
    Clemons while making a gesture with his hand that resembled slitting her throat.
    Hebert explained that “tax” referred to collecting a debt by force. Velinda Davis,
    another roommate, testified that she heard Michaels tell Christina that he would
    29
    “knock off the old lady.” On the evening of the murder, Davis saw Michaels and
    Popik take steps to alter their appearance and heard them say they were going to
    “tax someone.” Davis later realized that her kitchen knife was missing. Kimberly
    Platt, also a roommate, testified that Michaels told her he was going to “tax [an]
    old lady.”
    Other testimony placed Michaels in Clemons’s apartment at the relevant
    time. Michael Crawford testified that, on the evening of the murder, he saw
    Michaels and Popik walking on the side of the street and offered them a ride. He
    dropped them off approximately a mile and a half from Clemons’s apartment a few
    hours before the murder. Kimberly Anderson, who lived on the same floor as
    Clemons, testified that she came home at midnight on the night of the murder and
    saw Michaels and Popik walking toward Clemons’s apartment.
    The prosecution also introduced strong circumstantial evidence that
    Michaels murdered Clemons. Hair found in Clemons’s hand matched Michaels’s
    hair color, width, and structure. A crime scene reconstructionist testified that the
    killer would have had a lot of blood on his clothing, effectively ruling out Popik as
    the killer because he did not have enough blood on him when he was arrested
    shortly after the murder. Hebert testified that he had arranged for Paulk to drive the
    getaway car for Michaels and Popik; Charles Merritt, from the crime lab, testified
    30
    that Michaels’s identification, along with a belt buckle he was seen wearing the
    day before the murder, were found in Paulk’s car.
    Finally, the prosecution presented testimony from four witnesses to whom
    Michaels admitted, the night of the murder, killing a woman by cutting her throat.
    Rodney Hatch testified that Michaels said that he had sliced a woman’s throat
    during a burglary. Dennis Lucas testified that Michaels told him and two other
    witnesses that Michaels “and another companion had killed his girlfriend’s
    mother” and had “cut her throat with a knife.” Leon Madrid’s and Kim
    Burkhalter’s testimony supported Lucas’s account. The jury therefore would have
    heard a version of Michaels’s confession of guilt through these witnesses even if
    the taped confession had been excluded.
    In short, evidence concerning events before, during, and after the murder
    pointed to Michaels’s guilt, as did circumstantial evidence found in connection
    with the crime. Michaels’s taped confession, which recounted the murder and the
    events leading up to it in detail, confirmed what the witnesses and evidence already
    revealed, but, with respect to guilt (as opposed to details of the murder and
    motive), provided little additional information. Although confessions are powerful
    evidence, Fulminante, 499 U.S. at 296, the weight of the other evidence presented
    at trial overwhelmingly showed that Michaels murdered Clemons. We therefore
    conclude that the improper admission of his confession to the police did not have
    31
    “a substantial and injurious effect or influence on the jury” with regard to the guilt
    phase. Brecht, 
    507 U.S. at 623
    .
    2. Sentencing Phase
    Assessing the likely impact of the confession on the penalty phase of the
    trial, the members of this panel reach different conclusions, discussed in the
    accompanying opinion and dissent. The majority concludes that the impact of the
    confession on the penalty phase was harmless under Brecht.
    IV. Ineffective Assistance of Counsel for Disclosing Confidential Note to the
    Prosecution
    A. Background
    In Claim Four, Michaels argues that his trial lawyers provided ineffective
    assistance of counsel (“IAC”) by disclosing to the prosecution a confidential note
    from Michaels to his lawyers. The note was presented, and its import emphasized,
    as aggravating evidence during the penalty phase.
    Attorneys Burns and Duff represented Michaels in the early stages of his
    case, before it was severed from those of his codefendants Popik and Paulk. During
    the preliminary hearing on January 26, 1989, attended by all three defendants,
    Michaels handed his attorneys a folded handwritten note (“Popik note”). The note
    stated in part:
    [I] [r]equest each of the accused be put in separate handcuffs and that
    Mr. Popik sit at least one seat from his other co-defendants. There will
    32
    be great problems if this cannot be arranged as neither of his co-
    defendants are willing to restrain themselves from doing Popik bodily
    harm if forced to be locked up to him or sit next to him. Popik will be
    hurt if something can’t be worked out.
    Burns and Duff read the note, informed the court that a matter needed immediate
    attention, and, at an ex parte meeting, gave the judge the note. The court sealed the
    note and the transcript of the ex parte hearing, changed the seating arrangement of
    the codefendants, and continued with the preliminary hearing.
    The Popik note remained sealed until after attorneys Duff and Burns were
    replaced by attorneys Chambers and Grossberg. On September 11, 1989, the
    defense and the prosecution jointly requested that the trial court unseal several
    previously sealed documents. Defense counsel “d[idn’t] know what [the
    documents they were asking to unseal] were.” The trial court granted that request,
    allowing the prosecution to view the contents of the Popik note for the first time.
    During the penalty phase, the prosecution initially moved to offer the Popik
    note as aggravating evidence. The trial court ruled the note inadmissible. But, after
    Michaels offered testimony from three character witnesses to demonstrate that he
    was not dangerous, the trial court admitted the note as rebuttal evidence. Three
    witnesses testified about the Popik note, including Duff, Michaels’s attorney who
    had read the note during the preliminary hearing. The Popik note was the last
    evidence the prosecution presented and the only matter covered during the
    33
    government’s penalty phase rebuttal. The prosecution referred to the note in
    closing argument.
    On direct appeal, Michaels argued that the trial court erred in admitting the
    Popik note as rebuttal evidence because it had been disclosed in violation of the
    attorney-client privilege. The California Supreme Court held that introduction of
    the Popik note violated the attorney-client privilege but was harmless. Michaels I,
    
    28 Cal. 4th at 538
    .
    Michaels raised the Popik note issue again on state post-conviction review in
    his second state habeas petition, this time as an IAC claim that his counsel violated
    attorney-client privilege by disclosing the note to the prosecution. The California
    Supreme Court rejected this claim in a summary order on the merits as untimely
    and successive, and because it could have been raised in Michaels’s first state
    habeas petition. Michaels then raised the IAC claim in the district court, focusing
    almost entirely on the prejudice prong of Strickland v. Washington, 
    466 U.S. 668
    (1984). To support his contention that trial counsel had provided deficient
    performance, Michaels succinctly explained that “[t]he Supreme Court of
    California held that [Michaels’s] attorneys violated the attorney-client privilege by
    disclosing the note,” and “[w]hen an attorney violates the attorney-client privilege,
    he has engaged in deficient performance under . . . Strickland.”
    34
    The district court addressed the merits of Michaels’s Popik note IAC claim
    “irrespective of the state supreme court’s application of procedural bars.” Noting
    that “it is questionable whether trial counsel’s course of action ‘falls within the
    wide range of reasonable professional assistance,’” the district court ultimately
    held that, applying AEDPA deference, Michaels’s IAC claim failed under
    Strickland’s prejudice prong.
    B. Procedural Default
    The government maintains that Michaels procedurally defaulted his Popik
    note IAC claim by failing properly to raise it in state court. Applying Martinez v.
    Ryan, 
    566 U.S. 1
     (2012), we reject this contention.
    Federal courts are precluded from reviewing a claim that has been
    procedurally defaulted “pursuant to an independent and adequate state procedural
    rule . . . unless the prisoner can demonstrate cause for the default and actual
    prejudice as a result of the alleged violation of federal law.” Runningeagle v. Ryan,
    
    825 F.3d 970
    , 978-79 (9th Cir. 2016) (quoting Coleman v. 
    Thompson, 501
     U.S.
    722, 750 (1991)). Martinez held that a petitioner can establish cause for the
    procedural default of a “substantial claim of ineffective assistance at trial” if
    “under state law, claims of ineffective assistance of trial counsel must be raised in
    an initial-review collateral proceeding” and “there was no counsel or counsel in
    that proceeding was ineffective.” 
    566 U.S. at 17
    . A “state court’s alternate ruling
    35
    on the merits of the IAC claim,” as occurred here, “does not allow a federal court
    to ignore the procedural default ruling[;] it also does not bar a federal court from
    applying Martinez.” Apelt v. Ryan, 
    878 F.3d 800
    , 827 (9th Cir. 2017). So our
    question at this juncture is whether Michaels’s procedural default of his trial
    counsel IAC claim with regard to the Popik note is excused under Martinez.
    First, as to whether Martinez applies at all, Martinez’s holding is applicable
    to the criminal judgments of states whose procedures require, as a practical matter
    even if not as a legal mandate, that petitioners raise claims of ineffective assistance
    in an initial-review collateral proceeding. Trevino v. Thaler, 
    569 U.S. 413
    , 417,
    423 (2013). California is one such state. California “[a]ppellate jurisdiction is
    limited to the four corners of the record on appeal,” In re Carpenter, 
    9 Cal. 4th 634
    , 646 (1995), yet trial counsel IAC claims often depend on evidence outside the
    trial record. Reflecting this limitation, the California Supreme Court has
    consistently held that “claims of ineffective assistance of counsel should be raised
    on habeas corpus, not on direct appeal.” People v. Lopez, 
    42 Cal. 4th 960
    , 972
    (2008); see also People v. Wilson, 
    3 Cal. 4th 926
    , 936 (1992); People v. Pope, 
    23 Cal. 3d 412
    , 426 n.17 (1979). Consistent with that edict, the California Supreme
    Court in this case rejected other trial counsel IAC claims Michaels raised on direct
    appeal, noting, “[w]e have repeatedly emphasized that a claim of ineffective
    assistance is more appropriately decided in a habeas corpus proceeding.” Michaels
    36
    I, 
    28 Cal. 4th at 526
    . California’s procedural framework thus makes it “highly
    unlikely in a typical case” that direct appeal will offer a “meaningful opportunity”
    for review of trial counsel IAC claims. Trevino, 
    569 U.S. at 429
    ; see Woods v.
    Sinclair, 
    764 F.3d 1109
    , 1137 (9th Cir. 2014) (applying Trevino and holding that
    Washington state law meets the Martinez requirement that IAC claims are to be
    raised in initial-review collateral proceedings). Martinez therefore applies.
    As to whether the Popik note IAC claim was actually defaulted, Michaels
    argues that it was not because he raised a merits claim regarding the note on direct
    appeal. But even if Michaels’s reference to the Popik note in his direct appeal
    could be understood as attempting to raise the IAC claim at that junction—which is
    doubtful—IAC claims in California, as noted, should generally be raised in the
    first habeas corpus petition. Lopez, 
    42 Cal. 4th at 972
    . Michaels did not raise the
    Popik note claim on initial state habeas review, as required by California law. The
    IAC claim was therefore procedurally defaulted.
    C. Application of Martinez v. Ryan
    The district court rejected the Popik note claim on the merits for lack of
    Strickland prejudice and so did not address whether Michaels’s default should be
    excused under Martinez. However, a conclusion on the merits of an ineffective
    assistance of trial counsel claim under Strickland holds a petitioner to a higher
    burden than required in the Martinez procedural default context, which only
    37
    requires a showing that the ineffective assistance of trial counsel claim is
    “substantial.” Martinez, 
    566 U.S. at 17
    . That is especially true here, where we are
    required to apply AEDPA deference under 
    28 U.S.C. § 2254
    (d) to the state court’s
    summary merits decision on the IAC claim, but not to the logically prior question
    whether the procedural default of that claim is excused under Martinez. See Apelt,
    
    878 F.3d at 826-31
     (applying AEDPA deference to a state court’s rejection of a
    trial counsel IAC claim, but not to the Martinez analysis of whether ineffective
    post-conviction counsel excused the procedural default of the claim).
    Additionally, we recognized in Williams v. Filson that IAC claims that
    sufficiently demonstrate counsel’s deficient performance under Strickland but are
    insufficient to establish Strickland prejudice under AEDPA review are considered
    for their prejudicial effect in a cumulative error analysis. 
    908 F.3d 546
    , 570 (9th
    Cir. 2018). Williams held that the district court abused its discretion in denying an
    evidentiary hearing on an IAC claim regarding the failure to investigate and
    present evidence regarding Williams’s childhood and remanded for a hearing to
    determine if Williams was prejudiced by his counsel’s deficient performance. 
    Id. 569-70
    . Relevant here is Williams’s direction that the district court’s evidentiary
    hearing should also develop evidence regarding a different IAC claim—concerning
    the failure to present evidence of brain damage—even though, applying AEDPA
    deference, “it was not unreasonable for the Nevada Supreme Court to conclude that
    38
    [the] evidence did not, on its own, give rise to a reasonable probability that the
    outcome of the sentencing hearing would have been different.” 
    Id. at 564
    ; 570-71.
    We explained that the “incremental impact” of counsel’s deficient performance in
    failing to present evidence of brain damage, although not independently prejudicial
    under AEDPA review, was to be considered as part of a cumulative prejudice
    analysis. 
    Id. at 570
    ; see also Alcala v. Woodford, 
    334 F.3d 862
    , 893-94 (9th Cir.
    2003) (holding it proper to consider prejudice of deficient performance of counsel,
    along with trial court errors, in a cumulative error analysis, without reaching the
    prejudice of each IAC claim individually).
    Michaels raised a cumulative error argument with regard to the penalty
    phase in his habeas petition and now on appeal. Michaels’s Popik note IAC claim
    is therefore relevant not only as an isolated claim. If Michaels has satisfied the
    Martinez requirements, and applying AEDPA deference, his counsel’s
    performance was constitutionally deficient on the merits, that error is also
    potentially relevant in the context of cumulative error, independent of any isolated
    Strickland prejudice analysis under AEDPA.
    We therefore address the Martinez issue regarding Michaels’s Popik note
    IAC claim before turning to the merits of the deficient representation aspect of that
    claim under AEDPA.
    39
    Under Martinez, Michaels must prove both “cause” and “prejudice.” 
    566 U.S. at 10
    . To demonstrate “cause,” Michaels must show that “appointed counsel
    in the initial-review collateral proceeding, where the claim should have been
    raised, was ineffective under the standards of Strickland v. Washington, 
    466 U.S. 668
     (1984).” Id. at 14. Strickland in turn requires a petitioner establish both (1)
    counsel’s deficient performance and (2) prejudice. 
    466 U.S. at 687
    . To demonstrate
    prejudice under Strickland, the petitioner “must show that there is a reasonable
    probability that, but for counsel’s unprofessional errors, the result of the
    proceeding would have been different.” 
    Id. at 694
    . “A reasonable probability is a
    probability sufficient to undermine confidence in the outcome,” not a probability
    that the result “more likely than not” would have been different. 
    Id. at 693-94
    .
    To establish “prejudice” under Martinez, the underlying trial counsel IAC
    claim must also be “a substantial one, which is to say . . . that the claim has some
    merit.” 
    566 U.S. at 14
    . Although the cause and prejudice requirements are distinct,
    “[t]here is considerable overlap between these requirements, since each considers
    the strength and validity of the underlying ineffective assistance claim.” Djerf v.
    Ryan, 
    931 F.3d 870
    , 880 (9th Cir. 2019).
    We first address the prejudice prong of Martinez to determine whether
    Michaels’s claim of ineffective assistance of trial counsel is “substantial.” See
    Dickinson v. Shinn, 
    2 F.4th 851
    , 858 (9th Cir. 2021). We then evaluate the actions
    40
    of Michaels’s post-conviction counsel with regard to the trial counsel Popik note
    IAC claim under Strickland, to determine whether Michaels satisfies the cause
    requirement of Martinez. Based on this analysis, we conclude that the procedural
    default of Michaels’s IAC claim is excused under Martinez. See Apelt, 
    878 F.3d at 825
    .
    1. Ineffective Assistance of Trial Counsel and Prejudice Under Martinez
    Michaels contends that his trial counsel provided ineffective assistance by
    violating the attorney-client privilege, resulting in the disclosure to the prosecution
    of a damaging confidential communication. As the government recognized in its
    briefing, and as is clear from the record, Michaels mistakenly framed this IAC
    claim as an assertion that attorneys Burns and Duff, rather than Chambers and
    Grossberg, disclosed the Popik note to the prosecution. But Michaels has argued
    throughout his habeas proceedings that “giving the prosecution evidence” is what
    amounted to ineffective assistance of counsel. And, as we will discuss, both sets of
    attorneys breached of their duty of confidentiality; it was the actions of all of them,
    taken together, that resulted in the prosecution introducing the Popik note at trial.
    Michaels’s misnaming of the specific attorneys who directly triggered the release
    of the Popik note to the prosecution does not affect our analysis.
    a. Deficient Performance
    41
    McClure v. Thompson held that “[t]he duty of an attorney to keep his or her
    client’s confidences in all but a handful of carefully defined circumstances is so
    deeply ingrained in our legal system and so uniformly acknowledged as a critical
    component of reasonable representation by counsel that departure from this rule
    ‘make[s] out a deprivation of the Sixth Amendment right to counsel.’” 
    323 F.3d 1233
    , 1242-43 (9th Cir. 2003) (quoting Nix v. Whiteside, 
    475 U.S. 157
    , 171
    (1986)). McClure addressed whether a state court unreasonably denied a
    petitioner’s claim that his defense counsel rendered ineffective assistance by
    revealing information about the location of kidnapping victims who may have still
    been alive when the petitioner told his attorney the information in confidence. Id.
    at 1236-37. Opining that “[t]here are few professional relationships ‘involving a
    higher trust and confidence than that of attorney and client,’ and ‘few more
    anxiously guarded by the law, or governed by sterner principles of morality and
    justice,’” McClure held that unexcused disclosures of confidential information
    constituted constitutionally deficient performance. 11 Id. at 1242-43 (quoting
    Damron v. Herzog, 
    67 F.3d 211
    , 214 (9th Cir. 1995)). That holding was based on a
    straightforward application of Strickland and Nix, which McClure understood to
    “suggest[] that when ‘virtually all . . . sources speak with one voice’ as to what
    11
    McClure ultimately concluded that defense counsel’s disclosure fell into
    one of the narrow exceptions to the general duty of confidentiality. Id. at 1243.
    42
    constitutes reasonable attorney performance, departure from ethical canons and
    ABA guidelines ‘make[s] out a deprivation of the Sixth Amendment right to
    counsel.’” Id. at 1242 (quoting Nix, 
    475 U.S. at 166, 171
    ).
    Following McClure’s example, we look to California law regarding
    attorney-client privilege and attorney professional responsibility to guide our
    analysis as to whether Michaels’s attorneys’ conduct fell below the minimum
    acceptable standards of professional conduct and so constituted constitutionally
    deficient performance. 12 See 
    id.
     In 1989, the year Michaels’s first set of attorneys
    handed the Popik note to the state court and also the year Michaels’s second set of
    attorneys jointly moved with the prosecution to unseal the note, disclosing its
    contents to the prosecution, California law spoke with “one voice” regarding the
    attorney-client privilege. 
    Id.
     (quoting Nix, 
    475 U.S. at 165
    ). “Confidential
    communication between client and lawyer” was defined in California as
    “information transmitted between a client and his lawyer in the course of that
    12
    McClure also looked to the ABA Model Rules of Professional Conduct
    because the Oregon Code of Professional Responsibility “echo[ed] both the
    general principle of confidentiality” defined in the Model Rules, and “particular
    exceptions” relevant in McClure. 
    323 F.3d at 1242
    . But California’s “ethical
    prescriptions are those embodied in the state’s Rules of Professional Conduct and
    certain provisions of the Business and Professions Code (e.g., §§ 6068, 6090.5-
    6107),” and the ABA’s Model Rules of Professional Conduct has “no legal force
    of [its] own.” Gen. Dynamics Corp. v. Superior Ct., 
    7 Cal. 4th 1164
    , 1190 n.6
    (1994) (quotation omitted). We therefore do not consider the ABA Model Rules of
    Professional Conduct here.
    43
    relationship and in confidence by a means which, so far as the client is aware,
    discloses the information to no third persons.” 
    Cal. Evid. Code § 952
     (1967).
    California law protected a client’s privilege “to refuse to disclose, and to prevent
    another from disclosing, a confidential communication between client and lawyer.”
    
    Cal. Evid. Code § 954
     (1968). State law also imposed on every attorney the general
    duty “[t]o maintain inviolate the confidence, and at every peril to himself or herself
    to preserve the secrets, of his or her client.” 
    Cal. Bus. & Prof. Code § 6068
    (e)
    (1988).
    Unlike the relevant ethical guidance in McClure, California law at the time
    provided no exception to the attorney-client privilege or the duty of confidentiality
    that could justify Michaels’s attorneys’ disclosure of a damaging and confidential
    attorney-client communication. Cf. McClure, 
    323 F.3d at 1242
    . Michaels I
    recognized that the California legislature in 1993 created an exception to the
    attorney-client privilege “if the lawyer reasonably believes that disclosure of any
    confidential communication . . . is necessary to prevent the client from committing
    a criminal act that the lawyer believes is likely to result in death or substantial
    bodily harm.” 
    28 Cal. 4th at 538
     (quoting 
    Cal. Evid. Code § 956.5
     (1993)). A
    similar exception was added in 2003 to the California Business and Professions
    Code, 
    Cal. Bus. & Prof. Code § 6068
    (e)(2) (2003), and a rule regarding
    “Confidential Information of a Client” addressing § 6068(e) was added to the
    44
    California Rules of Professional Conduct, Cal. Rules of Prof. Conduct, rule 3-100
    (2004). These exceptions and rules would be relevant to assessing an attorney’s
    conduct today, but do not affect what constituted “reasonable attorney
    performance” in 1989.
    As the California Supreme Court correctly held, Michaels’s first set of trial
    counsel breached attorney-client privilege when they disclosed the Popik note, a
    confidential communication, to the trial court. See Michaels I, 
    28 Cal. 4th at
    537-
    38. The privilege was not waived when Michaels’s attorneys disclosed the note to
    the court, as Michaels never consented to the waiver. Because “it is the client who
    is the holder of the privilege, the power to waive it is his.” 1 McCormick on
    Evidence § 93 (Robert P. Mosteller ed., 8th ed. 2020); see also 
    Cal. Evid. Code § 954
     (1968).
    Michaels’s second set of attorneys similarly violated attorney-client
    privilege by moving jointly with the prosecution to unseal the note, disclosing the
    Popik note to the prosecution for the first time. As discussed infra pp. 54-55, that
    Grossberg and Chambers’s disclosure of the note was apparently inadvertent does
    not affect our conclusion that the breach of attorney-client confidentiality
    amounted to constitutionally deficient performance.
    Michaels’s attorneys’ breaches of attorney-client privilege, which together
    resulted in the disclosure of a damaging confidential communication to the
    45
    prosecution, were egregious violations of trial counsel’s duty of confidentiality
    under California law, and so a violation of Michaels’s right to effective assistance
    of counsel. Michaels’s claim that his attorneys provided constitutionally deficient
    assistance of counsel as to the Popik note clearly has “some merit,” and is therefore
    a “substantial” claim under the first prong of Strickland. Martinez, 
    566 U.S. at 14
    .
    b. Prejudice
    Michaels also demonstrated a substantial claim of prejudice resulting from
    his trial counsel’s deficient performance under Strickland, thereby meeting the
    prejudice requirement as incorporated in the Martinez analysis. For a claim to be
    “substantial” it must have “some merit.” 
    566 U.S. at 14
    . Although a majority of
    this panel holds the Popik note was not prejudicial, Michaels’s IAC claim
    nonetheless had “some merit” with regard to Strickland prejudice.
    The prosecution devoted a significant part of the penalty phase to
    emphasizing the Popik note as confirmation of its contention that Michaels would
    remain a danger in prison were he not executed. The Popik note evidence was the
    entirety of the prosecution’s rebuttal evidence during the penalty phase and so was
    the last evidence the jury heard. And the impact of prejudicial evidence “cannot be
    measured simply by how much air time it received at trial or how many pages it
    occupies in the record. Some toxins can be deadly in small doses.” Buck v. Davis,
    
    137 S. Ct. 759
    , 777 (2017). Michaels’s claim that the Popik note uniquely
    46
    prejudiced him because it encouraged the jury to infer that he would continue to
    pose a danger to others while in custody had “some” merit.
    In short, Michaels has a “substantial claim” that he was prejudiced by trial
    counsel’s deficient performance under Martinez.
    2. Ineffective Post-Conviction Relief (PCR) Counsel and Cause Under
    Martinez
    Having established a substantial claim of prejudice, Michaels must also
    establish “cause” under Martinez by demonstrating that “appointed counsel in the
    initial-review collateral proceeding, where the claim should have been raised, was
    ineffective under the standards of Strickland.” 
    566 U.S. at 14
    . Again, Strickland
    requires a petitioner to establish that (1) “counsel’s representation fell below an
    objective standard of reasonableness,” and (2) “there is a reasonable probability
    that, but for counsel’s unprofessional errors, the result of the proceeding would
    have been different.” 
    466 U.S. at 688, 694
    .
    a. Deficient Performance
    Michaels’s initial PCR attorneys’ failure to raise the Popik note IAC claim
    was unconstitutionally deficient performance. As explained supra pp. 42-47,
    Michaels had a substantial claim that his trial counsel’s violation of attorney-client
    privilege amounted to deficient performance. Michaels’s PCR attorneys should
    have so recognized. In particular, transcripts of pretrial proceedings reveal that
    Michaels’s second set of trial counsel asked the trial court to unseal several
    47
    documents without knowing that the Popik note was among those documents. PCR
    counsel should have seen this request as a violation of attorney-client privilege and
    raised it as a constitutional IAC claim. Nix and United States v. Zolin, 
    491 U.S. 554
    (1989), among other cases that emphasized the importance of the attorney-client
    privilege and established that “failure to adhere to reasonable professional
    standards” could be a “deprivation of the Sixth Amendment right to counsel,” were
    decided approximately a decade before Michaels’s counsel filed his first state
    habeas petition. Nix, 475 U.S. at 171. Had PCR counsel performed adequately,
    they would have recognized trial counsel’s conduct amounted to ineffective
    assistance and raised the IAC claim in the first habeas petition.
    Additionally, Michaels’s PCR counsel were evidently aware that his trial
    counsel should not have allowed the Popik note to get into the hands of the
    prosecution when they filed Michaels’s first habeas petition. The same attorneys
    who represented Michaels in the initial state habeas proceeding had represented
    him on direct appeal. At the time, California law required petitioners to file their
    first habeas petitions several months after filing their direct appeal reply brief. See
    Walker v. Martin, 
    562 U.S. 307
    , 312 n.1 (2011). On direct appeal, counsel raised
    the Popik note issue as an evidentiary claim, arguing that the trial court violated the
    attorney-client privilege. Yet, the same lawyers failed to raise the federal
    constitutional IAC claim on postconviction review, even though, as we have
    48
    discussed, supra pp. 36-37, California law generally requires IAC claims to be
    raised for the first time at that stage. Lopez, 
    42 Cal. 4th at 972
    . There is no
    conceivable strategic reason why Michaels’s counsel did not file the Popik note
    claim as a federal constitutional IAC claim on state habeas review shortly after
    filing a related claim on direct appeal. In declarations submitted as part of his
    second state habeas petition, Michaels’s PCR attorneys confirmed that they had
    simply not spotted the issue. A failure to recognize a potentially viable IAC claim
    is not a strategic decision.
    b. Prejudice
    Having concluded that PCR counsel’s conduct was deficient under
    Strickland, we next evaluate whether that deficient conduct prejudiced Michaels.
    Again, the California Supreme Court, in addition to rejecting the claim as
    procedurally defaulted, summarily denied Michaels’s Popik note IAC claim on the
    merits. Although that merits decision “is relevant to a determination of whether the
    failure to raise IAC claims in the first post-conviction petition was prejudicial,” it
    does not preclude us from excusing Michaels’s procedural default, as Apelt makes
    clear. 
    878 F.3d at 827
    .
    In Apelt, we evaluated whether a defaulted IAC claim could satisfy Martinez
    even though the state court had rejected the claim on the merits when it was raised
    in an amended petition for post-conviction relief. 
    Id. at 826
    . Apelt recognized that a
    49
    state court’s “conclusory alternate [merits] ruling” does not “place [petitioner’s]
    constitutional claim beyond even deferential review by a federal court,” if any
    procedural default can be overcome through a cause and prejudice inquiry. 
    Id. at 827
    .
    At this stage of the inquiry, then, we must evaluate under Martinez—and so
    not on deferential review, see supra p. 38—whether postconviction counsel
    performed ineffectively according to Strickland, an objective standard. See
    Strickland, 
    466 U.S. at 694-95
    . The question is not whether the particular PCR
    court would have rendered a more favorable decision, but whether some
    reasonable PCR court might have done so. See Apelt, 
    878 F.3d at 827
    . So we
    determine for ourselves what a reasonable PCR court could have done had PCR
    counsel properly raised the Popik note IAC claim.
    Whether PCR counsel’s ineffectiveness prejudiced Michaels depends in part
    on the strength of his underlying trial counsel IAC claim, Djerf, 931 F.3d at 880,
    and in part on the use PCR counsel could have made of that claim had it been
    properly raised in the state habeas petition. As to the first matter, we have held that
    Michaels’s trial counsel IAC claim was “substantial” as an independent claim.13
    Supra pp. 41-47. As to the second, whether or not PCR counsel could have
    13
    Notably, when we reach the merits of this claim, we hold, under AEDPA
    review, that counsel’s performance was constitutionally deficient. Infra pp. 52-55.
    50
    demonstrated that trial counsel’s ineffective actions leading to the introduction and
    discussion of the Popik note during the penalty phase was independently likely to
    have influenced the jury’s death penalty verdict is not determinative of the
    prejudice analysis here. Rather, because there was other, significant constitutional
    error at the penalty phase—the erroneous admission of the whole of Michael’s
    confession—the failure to raise the trial counsel Popik note IAC claim could be
    prejudicial as likely to have undermined an otherwise viable cumulative error
    claim regarding the penalty phase. See Williams v. Filson, 908 F.3d at 570.
    Again, in Michaels’s first habeas petition he argued that the cumulative
    effect of the constitutional errors made at his trial required reversal of his
    conviction and sentence. But PCR counsel’s failure specifically to raise the Popik
    note IAC claim kept the state court from considering the potential cumulative
    prejudice of that note in conjunction with other errors introduced at Michaels’s
    sentencing phase, and so fatally undermined any cumulative error claim.
    As Michaels’s Popik note IAC claim is substantial, especially considering its
    potential contribution to cumulative error, see supra pp. 41-47, the claim is strong
    enough to support a conclusion that, had Michaels’s PCR counsel performed
    effectively and raised the claim on initial state habeas review, there is a
    “reasonable probability that, but for counsel’s unprofessional errors, the result of
    the proceeding would have been different.” Strickland, 
    466 U.S. at 694
    . We
    51
    therefore hold that there is a reasonable probability the PCR court would have
    granted Michaels relief had his PCR counsel raised the trial counsel IAC claim.
    Michaels thus satisfies the requirements of Martinez, and his procedural
    default is excused. As a result, we may address the merits of Michaels’s claim that
    his counsel was constitutionally deficient, as well as—on the merits—the
    cumulative effect of counsel’s constitutionally deficient performance and
    Michaels’s improperly admitted confession on the sentencing phase of Michaels’s
    trial.
    D. Disclosure of the Popik Note Was Constitutionally Deficient Performance
    Under AEDPA Review
    Because the California Supreme Court denied Michaels’s Popik note IAC
    claim on the merits summarily, Michaels bears the burden of “showing there was
    no reasonable basis for the state court to deny relief” under Strickland’s standard.
    Richter, 
    562 U.S. at 98
    . Turning first to the deficient representation prong of
    Strickland, we hold that there was no reasonable basis for the state court to have
    concluded that Michaels’s trial counsel’s performance was constitutionally
    adequate as to the disclosure of the Popik note.
    McClure v. Thompson, applying AEDPA review, 
    323 F.3d at 1241
    ,
    determined that disclosing confidential information without justification in a
    manner that falls clearly below the minimum acceptable standards of professional
    conduct constitutes ineffective assistance of counsel under clearly established
    52
    Supreme Court law, 
    id. at 1241-42
    .14 As we have explained supra pp. 41-46, both
    sets of Michaels’s attorneys violated the attorney-client privilege as incorporated in
    California state law. There was no plausible exception to the attorney-client
    privilege or the duty of confidentiality under which Michaels’s attorneys might
    have reasonably been acting in disclosing Michaels’s confidential communication.
    See supra pp. 44-45. This case therefore does not present one of the “handful of
    carefully defined circumstances” in which an attorney’s departure from his or her
    duty of confidentiality does not amount to deficient performance. McClure, 
    323 F.3d at 1242-43
    .
    That the disclosure of the private communication to the prosecution was
    apparently the result of carelessness as to what was in the sealed record does not
    affect our conclusion. As a component of the duty of confidentiality, California
    law required attorneys “at every peril to himself or herself to preserve the secrets[]
    of his or her client.” 
    Cal. Bus. & Prof. Code § 6068
    (e) (1988). Michaels’s attorneys
    failed to uphold this duty by disclosing Michaels’s confidential communication
    without taking reasonable precautions, let alone “every peril,” to protect
    Michaels’s secrets. 
    Id.
    14
    Although not a Supreme Court decision, McClure informs what
    constitutes clearly established federal law for AEDPA purposes. Supra p. 20 n.8.
    53
    Chambers and Grossberg were appointed after the Popik note was sealed
    and had no knowledge of the note’s contents. When moving jointly with the
    prosecution to disclose previously sealed documents, Chambers stated to the trial
    court: “We have a joint request to unseal certain things that were sealed. We don’t
    know what they were.” There is no doubt that a competent attorney who did not
    know what was in sealed documents would have investigated the contents of the
    documents before agreeing to their disclosure. Grossberg and Chambers
    nonetheless moved jointly with the prosecution to unseal documents, one of which
    was the Popik note, providing access to both the defense and the prosecution.
    The result was that the Popik note—“unquestionably a communication from
    the client to the attorney [that] falls within the broad [attorney-client] privilege,”
    Michaels I, 
    28 Cal. 4th at
    537—was given to the prosecution. Chambers did ask for
    certain exceptions to disclosure, including Michaels’s previous motions to
    substitute counsel, but he did not ask for an exemption for the Popik note. That
    decision cannot be attributed to any strategic choice. As the record makes clear,
    defense counsel’s ultimate disclosure of the note to the prosecution was entirely
    inadvertent.
    In sum, defense counsel’s disclosure of the Popik note violated one of the
    core tenets of competent representation, protecting confidential communication.
    Under clearly established law and prevailing standards of representation at the
    54
    time, counsel’s breach of attorney-client confidentiality amounted to
    constitutionally deficient performance. It was objectively unreasonable for the
    California Supreme Court to conclude otherwise, assuming that it did. See Richter,
    
    562 U.S. at 102
    .
    VI. Other Claims 15
    A. Denial of Substitute Counsel
    In Claim Six, Michaels contends that the trial court violated Michaels’s
    Sixth Amendment right to counsel by denying his motion to substitute another
    attorney for Grossberg after an irreconcilable conflict developed between Michaels
    and Grossberg.
    15
    Michaels raised four additional claims that pertain only to the penalty
    phase. In Claim Five, Michaels contended that the government committed
    prosecutorial misconduct by making several assertedly improper remarks during its
    closing arguments in the penalty phase. In Claim Ten, Michaels argues generally
    that the Sixth Amendment guarantees the right to effective assistance of advisory
    counsel. Claims Eleven and Twelve assert specific IAC claims against Chambers
    after he was appointed advisory counsel. Claim Twelve faults Chambers for his
    alleged failure adequately to investigate and present certain mitigating evidence at
    the penalty phase. And although Michaels asserts that Claim Eleven—alleging
    Chambers was ineffective for failing to present the testimony of Christina’s
    father—“requir[es] reversal of his convictions and at least his death sentence,”
    Christina’s father’s testimony would have supported the defense’s theory for
    Michaels’s motive for killing Clemons, but not his innocence.
    The majority addresses these claims in the accompanying opinion; Judge
    Berzon would not reach these additional bases for habeas relief regarding the
    penalty phase, as she concludes the cumulative prejudice of Michaels’s confession
    and the Popik note substantially affected the outcome of that phase.
    55
    The court initially appointed James Burns as lead counsel and Charles Duff
    as co-counsel. Shortly after Duff was appointed, the trial court granted his request
    to be relieved for personal reasons, replacing him with Mark Chambers. Michaels
    then began having difficulties with attorney Burns. That deteriorating relationship
    resulted in Burns asking to be relieved, a request the trial court granted.
    The trial court then chose Richard Grossberg as new lead counsel, replacing
    Burns. Soon after Grossberg’s arrival, Michaels became discontented with his
    representation. Michaels submitted a letter to the court complaining, among other
    things, that it had taken Grossberg “three months to even get the courts to finance
    him to work my case, which has caused my case’s defense three months of ‘dead
    time.’ . . . [T]hus, none of the specialists, investigators, etc. have even started
    working my case’s defence [sic], nor have the many other aspects, which all
    require financing, begun to get started.”
    One month after submitting that letter, Michaels moved to remove
    Grossberg as lead counsel under People v. Marsden, 
    465 P.2d 44
     (Cal. 1970), a
    request the trial court denied. The court concluded that any difficulties in
    representation were caused by Michaels’s unwillingness to cooperate and that
    Michaels did not show that he was receiving inadequate assistance from
    Grossberg.
    56
    Grossberg also moved to be relieved as counsel, stating that “[Michaels]
    can’t have a fair trial as long as I’m his lawyer.” Grossberg represented that his
    preparation for trial had up until that point been only “ministerial” and “clerical.”
    And he reported that he had not had a single “meaningful conference [with
    Michaels] insofar as the facts of the case are concerned.” Chambers confirmed to
    the trial court that despite good-faith attempts to improve the relationship, there
    was an “irreconcilable conflict between Mr. Grossberg and Mr. Michaels.” He
    explained that there were two primary points of conflict: First, Michaels objected
    to Grossberg’s proposed defense strategy, which was to represent that Michaels
    was in Clemons’s apartment but never entered the bedroom where she was killed.
    Second, Michaels objected to the investigator Grossberg hired; the investigator
    assertedly conducted only a single interview with Christina and tried to contact
    only one other witness (who refused to speak to the investigator).
    The trial court denied Grossberg’s motion. On February 5, 1990, Grossberg
    renewed his motion to be relieved, but it was again denied.
    In the last reasoned state court opinion addressing this claim, the California
    Supreme Court rejected it on the grounds that (1) Michaels had failed to show how
    the conflict between him and Grossberg resulted in constitutionally inadequate
    assistance of counsel; and (2) Michaels had not shown that the conflict was
    irreconcilable, as Michaels had caused the breakdown in the relationship and
    57
    refused to work to improve it. Michaels I, 
    28 Cal. 4th at 523
    . This holding was
    neither an unreasonable application of clearly established Supreme Court law nor
    an unreasonable determination of the facts. See 
    28 U.S.C. § 2254
    (d).
    The Sixth Amendment guarantees defendants in criminal cases the right to
    adequate representation. See Strickland, 
    466 U.S. at 686
    . By extension, a defendant
    is also entitled to substitute counsel if an “irreconcilable conflict” between a
    defendant and his counsel prevents counsel from rendering effective assistance.
    Schell v. Witek, 
    218 F.3d 1017
    , 1025 (9th Cir. 2000) (en banc).
    Boundaries surround this principle. The Sixth Amendment does not
    guarantee the right to appointment of a particular attorney, see Caplin & Drysdale,
    Chartered v. United States, 
    491 U.S. 617
    , 624 (1989), or the right to a “meaningful
    relationship” with that attorney. Morris v. Slappy, 
    461 U.S. 1
    , 14 (1983). These
    bounding principles mean that a defendant is not entitled to substitute counsel
    because of a conflict of his “own making,” Schell, 
    218 F.3d at 1026
    , or because he
    refuses to cooperate with counsel “because of dislike or distrust” of counsel,
    Plumlee v. Masto, 
    512 F.3d 1204
    , 1211 (9th Cir. 2008) (en banc). Otherwise, a
    defendant could effectively overturn the appointment of any attorney by refusing to
    cooperate with that attorney, intentionally delaying proceedings until he was
    appointed his attorney of choice. So the dispositive question when a defendant
    complains of a conflict with his attorney but the conflict is of his own making is
    58
    the same as in IAC cases: Did counsel provide constitutionally adequate counsel
    according to the standards established in Strickland? See Plumlee, 
    512 F.3d at 1211
    .
    Here, the California Supreme Court reasonably concluded that the conflict
    between Michaels and his attorney was the result of Michaels’s subjective distrust
    of Grossberg, and that Michaels’s actions triggered the breakdown of his
    relationship with Grossberg. Michaels I, 
    28 Cal. 4th at 523
    . Michaels stated in his
    motion to substitute counsel that “Grossberg has proven himself to be unreliable,
    untrustworthy, and someone whom I cannot place any confidence in,” and that he
    had as a result asked Grossberg not to contact him or anyone else related to the
    case. Thereafter, Grossberg attempted to communicate with Michaels on several
    occasions without success.
    According to Chambers’s account, much of Michaels’s distrust of Grossberg
    resulted from disagreements about trial tactics. Such disagreements do not
    constitute a basis for an unconstitutionally irreconcilable conflict. “[A] lawyer may
    properly make a tactical determination of how to run a trial even in the face of his
    client’s incomprehension or even explicit disapproval.” Schell, 
    218 F.3d at
    1026
    n.8 (quoting Brookhart v. Janis, 
    384 U.S. 1
    , 8 (1966) (alteration in original)); see
    also Florida v. Nixon, 
    543 U.S. 175
    , 187 (2004).
    59
    The state court’s other conclusion—that Grossberg rendered constitutionally
    adequate assistance as it relates to the attorney-client conflict claim—was also
    reasonable. Contrary to Michaels’s assertions, the record reveals that Grossberg
    took numerous steps to prepare for trial. Grossberg attended the trial of Michaels’s
    codefendant Darren Popik, hired a psychologist and investigator, and interviewed
    several witnesses. Billing records detail the investigator’s efforts to contact and
    interview several other witnesses as well as to interview Michaels. The
    “[t]imesheets indicate that [Defendant’s] trial counsel investigated mitigating
    evidence.”16 Pinholster, 
    563 U.S. at 192
    . On the substitution of counsel claim,
    Michaels cannot overcome our “doubly” deferential review of his IAC claim under
    AEDPA. Richter, 
    562 U.S. at 105
    . We deny Michaels’s habeas petition with
    respect to his sixth claim for relief.
    B. Ineffective Assistance of Counsel for Advising Michaels to Proceed Pro Se
    In Claim Seven, Michaels takes issue with his other attorney, Chambers,
    arguing that he provided ineffective assistance of counsel when he advised
    Michaels to represent himself after the trial court refused to relieve Grossberg.
    16
    Although Grossberg himself warned the trial court that his continued
    representation of Michaels would prevent Michaels from receiving a fair trial, that
    warning is not dispositive. The Strickland deficient performance inquiry, here
    applicable because Michaels caused the relationship breakdown, is an objective
    one. See 
    466 U.S. at 688
    .
    60
    After the trial court denied the several motions to relieve Grossberg, it
    allowed Chambers to become lead counsel, with Grossberg as the secondary
    attorney. Chambers then advised Michaels to seek to represent himself pursuant to
    Faretta v. California, 
    422 U.S. 806
    , 834 (1975), and he did so. 17 After an extensive
    hearing, the trial court granted the Faretta motion. The court found that Michaels
    was competent and that his waiver of the right to counsel was knowing, intelligent,
    and voluntary. The trial court then appointed both Grossberg and Chambers as
    advisory counsel.
    As it turned out, during both the guilt and penalty phases, Chambers
    conducted the trial proceedings. Given that circumstance, we agree with the district
    court that, whether or not Chambers provided constitutionally inadequate advice
    regarding the Faretta motion, Michaels has not shown that he was prejudiced by
    any such advice. Before Michaels moved to proceed pro se, he had refused to
    17
    The government argues that the record does not show that Chambers
    actually advised Michaels to proceed pro se. The California Supreme Court
    “evaluates a petition ‘by asking whether, assuming the petition’s factual allegations
    are true, the petitioner would be entitled to relief. If no prima facie case for relief is
    stated, the court will summarily deny the petition. If, however, the court finds the
    factual allegations, taken as true, establish a prima facie case for relief, the court
    will issue an [order to show cause].’” In re Figueroa, 
    4 Cal. 5th 576
    , 587 (2018)
    (alteration in original) (citation omitted) (quoting People v. Duvall, 
    9 Cal. 4th 464
    ,
    474-75 (1995) (en banc)). Because the state court denied Michaels’s argument on
    the merits in a summary order, it necessarily assumed the truth of his factual
    allegations. We therefore also assume that Chambers advised Michaels to proceed
    pro se.
    61
    cooperate with Grossberg, and the trial court had allowed Chambers to become
    lead counsel. Although Michaels later officially proceeded pro se, he
    acknowledges that Chambers “conducted the entirety of the pretrial, trial, and
    penalty proceedings,” while Grossberg remained sidelined. Nothing in the record
    suggests that if he had remained formally appointed, Chambers would have
    conducted proceedings any differently than he did as advisory counsel.18
    Michaels makes no real attempt to show that the result would have been
    more favorable to him had Chambers and Grossberg remained as appointed, rather
    than advisory, counsel. Instead, he tries to circumvent his burden to prove
    prejudice in two ways.
    First, he argues that because Chambers’s advice tainted the Faretta decision,
    there was structural error not subject to traditional Strickland prejudice analysis.
    But in Harding v. Lewis, 
    834 F.2d 853
     (9th Cir. 1987), we rejected a similar
    structural error argument, holding that “[i]n [that] case, it [was] not unduly
    burdensome for us to assess the effect of . . . advice [to proceed pro se] on the
    outcome of [the defendant’s] trial.” 
    Id. at 859
    . Here, as the advice had no practical
    impact, as it turned out, on the conduct of the trial, the outcome of the trial could
    not possibly have been different had Chambers been officially designated as
    18
    The majority’s conclusion that Michaels was not prejudiced by the advice to
    proceed pro se relies on its conclusion that Chambers, acting as nominally advisory
    counsel, did not render ineffective assistance. Majority Op. at 24-45.
    62
    counsel rather than as standby counsel. Under these circumstances, we follow
    Harding and decline to presume prejudice.
    Second, Michaels claims that the proper prejudice inquiry is whether he
    would have proceeded pro se without Chambers’s advice, not whether the trial
    would have proceeded differently had he not proceeded pro se. Citing Lafler v.
    Cooper, 
    566 U.S. 156
     (2012), Michaels analogizes to IAC claims in the plea-
    bargaining context, contending that the inquiry in that context is simply “whether
    the result of the pretrial proceeding would have been different.”
    Michaels misreads Cooper. That case held that to show prejudice from an
    attorney’s deficient advice to reject a plea offer, a defendant must establish more
    than that he would have accepted the plea deal. He also must show that “there is a
    reasonable probability that the plea offer would have been presented to the
    court . . . , that the court would have accepted its terms, and that the conviction or
    sentence, or both, under the offer’s terms would have been less severe than under
    the judgment and sentence that in fact were imposed.” 566 U.S. at 164 (emphasis
    added).
    Thus, accepting the analogy, Michaels cannot simply show that he would not
    have proceeded pro se without Chambers’s advice. He must also show that keeping
    Chambers as appointed counsel would have led to a more favorable result. He
    cannot do so, as Chambers fully represented Michaels at trial despite Michaels’s
    63
    formal pro se status. We therefore reject Michaels’s claim that Chambers rendered
    ineffective assistance by advising him to proceed pro se.19
    C. Trial Court’s Failure to Inquire into Michaels’s Competency, and
    Counsel’s Failure to Raise Competency
    In Claim Nine, Michaels contended that (1) the trial court erred in not
    conducting a sua sponte competency hearing and (2) his attorneys were
    constitutionally ineffective in failing to raise the competency issue.
    Michaels lists a number of facts which he alleges suggests he was
    incompetent: he (1) was under heavy medication at the time of trial; (2) had gone
    on a hunger strike while in custody; (3) initially pleaded not guilty by reason of
    insanity; (4) had previously burned some of his flesh to the bone; (5) had an
    “other-than-honorable” discharge from the Marines for psychiatric reasons; (6) had
    a history of childhood physical and sexual trauma; (7) was in need of
    psychotherapy; and (8) had spent significant portions of his pretrial custody in
    isolation and been twice taken to the jail’s medical facility on the verge of
    committing suicide. Most of these facts are contained in two psychological reports
    ordered by the trial court in March 1989, a year before the trial. Both reports
    19
    In Claim Eight, Michaels argued that his waiver of counsel was invalid
    because (1) the trial court failed to inquire sufficiently into his medication usage at
    his waiver hearing and (2) Michaels moved to waive counsel only because the trial
    court would not replace Grossberg. This claim fails for the same reason as Claim
    Seven—as a functional matter, Michaels was represented by counsel at the guilt
    and penalty phases.
    64
    ultimately concluded that Michaels, although suffering from mental illness,
    exhibited normal levels of intelligence and was fully aware of the nature of his
    actions. In his state habeas petition, Michaels presented additional facts showing
    that he had repeated contacts with the psychiatric unit while in custody; had been
    prescribed several psychotropic drugs; hoarded these drugs; was suspected of
    multiple suicide attempts; and, according to an expert evaluation, had longstanding
    brain damage.
    The California Supreme Court summarily rejected Michaels’s incompetency
    claims on the merits. We conclude that habeas relief on these incompetency claims
    is not warranted. “[T]he criminal trial of an incompetent defendant violates due
    process.” Medina v. California, 
    505 U.S. 437
    , 453 (1992). To be competent to
    stand trial, a defendant must have “sufficient present ability to consult with his
    lawyer with a reasonable degree of rational understanding . . . [and] a rational and
    factual understanding of the proceedings against him.” Cooper v. Oklahoma, 
    517 U.S. 348
    , 354 (1996) (alterations in original) (quoting Dusky v. United States, 
    362 U.S. 402
    , 402 (1960) (per curiam)). The same standard applies when evaluating
    competency to waive counsel. 20 See Godinez v. Moran, 
    509 U.S. 389
    , 398 (1993).
    20
    Michaels’s reliance on Indiana v. Edwards, 
    554 U.S. 164
     (2008), to argue
    that the standard for competency to proceed to trial is not the same as the
    competency standard for self-representation, is unavailing. Edwards held that a
    state may insist upon representation for a defendant who is competent to stand trial
    65
    Pate v. Robinson, 
    383 U.S. 375
     (1966), held that, where serious questions
    about a defendant’s competency to stand trial have been raised or are evident, a
    trial court’s failure to conduct further inquiry violates due process. 
    Id. at 385
    .
    “[E]vidence of a defendant’s irrational behavior, his demeanor at trial, and any
    prior medical opinion on competence to stand trial are all relevant in determining
    whether further inquiry is required, but . . . even one of these factors standing alone
    may, in some circumstances, be sufficient.” Drope v. Missouri, 
    420 U.S. 162
    , 180
    (1975). In determining whether the failure to conduct an inquiry rises to a
    constitutional violation, the panel “may consider only the evidence that was before
    the trial judge.”21 McMurtrey v. Ryan, 
    539 F.3d 1112
    , 1119 (9th Cir. 2008).
    Here, the California Supreme Court rejected Michaels’s competency claim
    on the merits, necessarily concluding that the evidence before the trial court was
    insufficient to require a sua sponte competency hearing. That conclusion was not
    unreasonable under § 2254(d) of AEDPA.
    As the district court concluded, many of the competency-related facts
    flagged by Michaels—such as his initial plea of not guilty by reason of insanity or
    but nonetheless suffers serious mental deficiencies. Id. at 178. It expressly did not
    address whether states are required to provide representation to such individuals.
    See id.
    21
    The evidence Michaels produced for his state habeas petition, is thus not
    pertinent to this claim. It is, however, relevant for his competency-related IAC
    claim, discussed below.
    66
    his complaints about jail personnel—do not suggest incompetency to stand trial.
    Likewise, the psychological reports ultimately indicated that Michaels, although
    troubled, was “able to consult with his lawyer with a reasonable degree of rational
    understanding” and maintained a “rational” and “factual understanding of the
    proceedings against him.” McMurtrey, 
    539 F.3d at 1119
    . And although this court
    has recognized that the use of psychotropic medication is one factor to be
    considered in evaluating competency to stand trial, see, e.g., 
    id.,
     the defendants in
    those cases exhibited other substantial symptoms of incompetence, such as erratic
    and irrational behavior during trial.
    Deciding whether further inquiry into a defendant’s competence is needed
    requires hard judgment calls. “There are, of course, no fixed or immutable signs
    which invariably indicate the need for further inquiry to determine fitness to
    proceed; the question is often a difficult one in which a wide range of
    manifestations and subtle nuances are implicated.” Drope, 
    420 U.S. at 180
    . Under
    AEDPA, “evaluating whether a rule application was unreasonable requires
    considering the rule’s specificity. The more general the rule, the more leeway
    courts have in reaching outcomes in case-by-case determinations.” Yarborough,
    
    541 U.S. at 664
    . Given the generality and flexibility of the competency inquiry and
    the deference owed under AEDPA, the record does not establish that the California
    67
    Supreme Court’s rejection of Michaels’s inquiry into incompetency to stand trial
    claim was unreasonable.
    For similar reasons, Michaels’s counsel were not ineffective because they
    did not raise the competency issue. The additional evidence submitted with
    Michaels’s first state habeas petition is cognizable as to the IAC competency
    claim, see, e.g., Cunningham v. Wong, 
    704 F.3d 1143
    , 1161 (9th Cir. 2013), but
    does not affect our conclusion. The two doctors retained as consultants to evaluate
    Michaels submitted declarations in support of Michaels’s federal habeas petition,
    but those declarations did not discuss his competency to stand trial. And
    Michaels’s so-called “suicide attempt” was, according to Michaels himself,
    motivated by his desire to speak to an attorney, not by genuine suicidal ideation.
    The California Supreme Court’s rejection of Michaels’s IAC competency claim
    was not unreasonable.
    D. Denial of Request for an Additional Six-Month Continuance of Trial
    In Claim Thirteen, Michaels argued that the trial court’s denial of his request
    for a continuance before trial on March 26, 1990, violated his due process rights.
    The trial court agreed in February 1990 to continue Michaels’s trial until
    April after granting his self-representation request. In the interim, the prosecution
    notified Michaels that it intended to introduce certain evidence not mentioned
    previously at the penalty phase—namely, the Popik note discussed above and other
    68
    instances of Michaels threatening violence against Popik, and being violent toward
    Cristina Clemons. On March 26, Michaels requested a further six-month
    continuance, maintaining that he had not been provided with access to a “pro per
    cell” with law books and writing implements until February 23, that his former
    investigator had inadequately prepared the case, and that he had not received
    funding for further investigation until March 13.
    The trial court denied the request, noting that Michaels had the benefit of
    numerous motions filed by Grossberg that Michaels “may choose to adopt”; that he
    was placed in a “pro per cell” sixty days before trial; and that he would have at
    least ninety days before opening statements to prepare, given the likely length of
    jury voir dire. The trial court also emphasized that it had already granted multiple
    continuances. On direct appeal, the California Supreme Court rejected Michaels’s
    claim that the denial of a continuance was improper, noting that Michaels “had
    funding, an active investigator, and advisory counsel who was familiar with the
    case” and that, “although much remained to be done, [Michaels] had 60 days” to
    prepare for trial. Michaels I, 
    28 Cal. 4th at 525
    .
    The denial of a request for a continuance may, under unusual circumstances,
    result in a denial of due process. See Ungar v. Sarafite, 
    376 U.S. 575
    , 589 (1964).
    But “[t]he matter of continuance is traditionally within the discretion of the trial
    judge, and it is not every denial of a request for more time that violates due process
    69
    even if the party fails to offer evidence or is compelled to defend without counsel.”
    Id.; see also Morris, 
    461 U.S. at 11
    . For that reason, “[t]here are no mechanical
    tests for deciding when a denial of a continuance is so arbitrary as to violate due
    process. The answer must be found in the circumstances present in every case,
    particularly in the reasons presented to the trial judge at the time the request is
    denied.” Ungar, 
    376 U.S. at 589
    .
    On appeal, Michaels focuses on the California Supreme Court’s failure in its
    opinion to discuss the prosecution’s notices of intent to introduce additional
    evidence in aggravation. Nothing in the record suggests that either the trial court or
    the California Supreme Court failed to consider those notices. Michaels
    specifically raised these notices in his request for a continuance, and the prosecutor
    argued at the hearing that the additional evidence raised in those notices would
    only require Michaels to investigate two additional witnesses. Nothing in the trial
    court’s decision suggests that it failed to consider on the continuance motion the
    arguments before it concerning additional evidence.
    Likewise, when the California Supreme Court evaluated the issue, it
    determined that there was sufficient time for Michaels to prepare for trial
    notwithstanding the fact that “much remained to be done.” Michaels I, 
    28 Cal. 4th at 525
    . The legal standard for determining whether a continuance violates due
    process affords substantial discretion to a trial court. See Ungar, 
    376 U.S. at 589
    .
    70
    Given that broad standard, as well as the deference owed under AEDPA, the
    circumstances here do not render the California Supreme Court’s decision that the
    denial of the continuance was not a due process violation unreasonable. See
    Yarborough, 
    541 U.S. at 664
    .
    VI. Conclusion
    We AFFIRM the district court’s judgment denying a writ of habeas corpus
    with respect to the guilt phase. With respect to the penalty phase, the majority finds
    no cumulative or other prejudice, and affirms the denial of the petition, for reasons
    stated in its separate opinion; Judge Berzon dissents from that holding for the
    reasons stated in her dissent.
    71
    FILED
    OCT 18 2022
    Michaels v. Davis,                                                       MOLLY C. DWYER, CLERK
    No. 15-99005                                                              U.S. COURT OF APPEALS
    Bea, Circuit Judge:
    This majority opinion addresses Michaels’s three remaining claims: (1)
    whether the admission of Michaels’s confession and the Popik note prejudiced the
    penalty phase of the trial, (2) whether the prosecutor committed misconduct during
    the penalty-phase closing arguments, and (3) whether Michaels is entitled to relief
    for ineffective assistance of advisory counsel. We answer each of these questions in
    the negative and affirm the district court’s denial of habeas relief on all claims.
    I.    Penalty-Phase Prejudice
    Michaels argues that he is entitled to habeas relief because the introduction of
    his confession and the Popik note during the penalty phase of the trial prejudiced
    him by causing the jury to render a death verdict they otherwise would not have in
    the absence of this unconstitutional evidence.
    Constitutional error does not entitle Michaels to habeas relief if an error was
    harmless. In habeas proceedings, we apply the actual prejudice standard set forth in
    Brecht v. Abrahamson, 
    507 U.S. 619
     (1993). Under Brecht, habeas relief is available
    only if the constitutional error had a “‘substantial and injurious effect or influence’”
    on the verdict. 
    Id. at 623
     (quoting Kotteakos v. United States, 
    328 U.S. 750
    , 776
    (1946)).
    1
    “When a federal judge in a habeas proceeding is in grave doubt about whether
    a trial error of federal law had a substantial and injurious effect or influence in
    determining the jury’s verdict, that error is not harmless. And, the petitioner must
    win.” O’Neal v. McAninch, 
    513 U.S. 432
    , 436 (1995) (internal quotation marks
    omitted). “By ‘grave doubt’ we mean that, in the judge’s mind, the matter is so
    evenly balanced that he feels himself in virtual equipoise as to the harmlessness of
    the error.” 
    Id. at 435
    . Furthermore, these constitutional errors are not viewed in
    isolation. Indeed, “the cumulative effect of multiple errors may prejudice a
    defendant even if no single error in isolation is sufficient to establish prejudice.”
    Williams v. Filson, 
    908 F.3d 546
    , 570 (9th Cir. 2018).
    So far, the panel agrees that the introduction of Michaels’s confession during
    the penalty phase of the trial infringed his right to silence, and that Chambers’s
    failure to object to the introduction in evidence of the Popik note was deficient
    performance by Chambers under Strickland, based on clearly established federal
    law. The panel also agrees that the introduction of the confession during the guilt
    phase of the trial did not prejudice Michaels because the prosecution presented
    overwhelming and admissible evidence of guilt. The majority and the dissent part
    ways on the sole question whether these constitutional errors prejudiced Michaels
    during the penalty phase of the trial. Ultimately, because the confession and the
    Popik note were cumulative of admissible evidence demonstrating the brutality of
    2
    the crime, Michaels’s penchant for future dangerousness, and the motive for the
    murder, we are not in “grave doubt” that the error had a “substantial and injurious
    effect” on the trial and therefore affirm the district court’s denial of habeas relief for
    lack of prejudice. O’Neal, 
    513 U.S. at 436
    .
    A.     Standard of Review
    Because the California Supreme Court held there was no Miranda violation
    as to the introduction in evidence of Michaels’s recorded confession, it made no
    determination as to whether any such error was harmless during the penalty phase,
    and we review this element of Michaels’s claim de novo. See Porter v. McCollum,
    
    558 U.S. 30
    , 39 (2009) (per curiam). Similarly, because the California Supreme
    Court did not hold that a Miranda violation occurred, it never ruled on whether
    Michaels’s confession and the Popik note had cumulative prejudicial effect and we
    review this issue de novo as well. 
    Id.
    B.     The Confession
    As discussed in the per curiam opinion, ordinarily, a defendant’s own
    confession is “the most probative and damaging evidence that can be admitted
    against him.” Arizona v. Fulminante, 
    499 U.S. 279
    , 296 (1991) (citation omitted),
    and an erroneously admitted confession “will seldom be harmless,” United States v.
    Williams, 
    435 F.3d 1148
    , 1162 (9th Cir. 2006). But, just as we concluded above,
    seldom does not mean never, and the limited use of the confession, along with the
    3
    sheer volume of aggravating evidence properly admitted against Michaels during the
    penalty phase of the trial, rendered the admission of his confession harmless.
    We note at the outset that the prosecution relied on the confession infrequently
    during its closing argument. Indeed, the prosecutor detailed Michaels’s criminal
    history for nearly eleven pages of his forty-page closing argument before mentioning
    the confession evidence at all, which evinces its diminished importance. Indeed, this
    criminal history was a particularly important aggravating factor, on which the jury
    heard substantial evidence during the penalty phase which the prosecutor
    summarized as follows during his closing argument:
    1981, he had a gun in his sock. He went into Joseph Toy’s house,
    stole a gun. He was armed and dangerous. Long Beach, 1981.
    That’s one. Texas, two knives, one in each boot, 1987. Another
    factor in aggravation. Texas, beating on Christina Clemons who
    was drunk . . . . That’s a factor in aggravation. Oceanside,
    January the 23rd, two knives, two blades under his jacket for
    protection. That’s a factor in aggravation. Oceanside, 1988,
    August the 30th, putting a gun to Chad Fuller’s head. That’s
    aggravation. That’s a reason for the death penalty. Oceanside, the
    next night, having a revolver hidden in the small of his back.
    That’s aggravation. Oceanside, September the 11th, 1988,
    robbing Chad Fuller, another act of violence. That’s aggravation.
    This evidence of Michaels’s criminal past was entirely independent from the
    confession evidence, but something upon which the jury was perfectly able to and
    likely did rely, given the length of time the prosecutor discussed it during the closing
    argument. The dissent argues that evidence of Michaels’s violent past does not
    convincingly render the confession nonprejudicial because we have found prejudice
    4
    in cases with even more extreme aggravating factors. But each case the dissent cites
    for this proposition is distinguishable from this case. In Wharton v. Chappell, 
    765 F.3d 953
    , 978-79 (9th Cir. 2014), where the defendant brutally murdered his
    girlfriend and had prior felony convictions for rape and murder, we held that it was
    the failure to introduce unique mitigating evidence that resulted in prejudice, not, as
    here, the introduction of cumulative aggravating evidence of the defendant’s
    capacity for violence. In Hovey v. Ayers, 
    458 F.3d 892
    , 930 (9th Cir. 2003), where
    the defendant kidnapped and murdered a young girl, we found that prejudice resulted
    from the defendant’s ineffective assistance of counsel in failing to turn over
    mitigating evidence to the defense expert during the sentencing phase because (1)
    the defendant had no history of serious violent crimes, and (2) the jury asked several
    questions of the court during deliberations about the death penalty. In Douglas v.
    Woodford, 
    316 F.3d 1079
    , 1090 (9th Cir. 2003), we held, similarly to Wharton, that
    it was the failure to introduce mitigating evidence that resulted in prejudice, not the
    introduction of cumulative evidence in aggravation.
    Even were we to accept the proposition that Michaels’s history of violence is
    not as extreme as what we saw in the Wharton and Douglas cases, missing mitigation
    evidence is far likelier to have an impact on a penalty-phase jury than evidence of
    the defendant’s criminality that the jury has already heard repeatedly from
    admissible sources. This cumulative evidence point is key; Brecht, which established
    5
    the harmless-error review standard we apply in these cases, held that the defendant
    suffered no prejudice from the prosecutor’s repeated reference to his post-Miranda
    silence because that evidence was “in effect, cumulative” of admissible evidence of
    pre-Miranda silence. 
    507 U.S. at 639
    . We see the same pattern of cumulative
    evidence in Michaels’s case.
    The dissent argues that the confession prejudiced Michaels because it was
    uniquely able to describe the murder and Michaels’s role in it in shocking and
    graphic detail. But the jury heard extensive other evidence on this point. Defense
    expert witness Dr. Hubbard testified that Michaels told him that “he cut [the
    victim’s] throat and [the] knife broke,” after which Popik got another knife from the
    kitchen and Michaels “cut her throat some more.” An acquaintance of Michaels,
    Rodney Hatch, testified that, shortly after the murder, Michaels admitted to him that
    he had slit a woman’s throat. People v. Michaels, 
    28 Cal. 4th 486
    , 502 (Cal. 2002).
    Two other people present with Hatch, Kimberly Buckhalter and Dennis Lucas,
    testified that Michaels used a gesture to suggest that he had killed a woman by
    cutting her throat. 
    Id.
     The jury also heard evidence that Michaels told people ahead
    of time that he planned to cut the victim’s throat. The prosecutor emphasized that
    Michaels’s “lying in wait” was an aggravating factor, but the jury did not have to
    rely on the confession evidence to make this point. Dr. Hubbard also testified that
    Michaels said he had to “kill [] time” before the murder because when he first visited
    6
    the victim’s apartment in the early evening, she was at work, so he returned later at
    midnight.
    The dissent also asserts that Michaels’s demeanor and laughter during the
    confession, which the jury was able to observe by watching the video of his police
    interrogation, demonstrated his lack of remorse. But, to whatever extent this is true,
    the prosecution also presented to the jury other admissible and direct evidence of
    Michaels’s lack of remorse. The jury heard the testimony of Cheryl Goldenberg,
    Michaels’s sister. Six months after the murder, she received a letter from Michaels
    while he was in prison, stating that he will “never have any regret” for what he did
    to the victim. Eighteen months after the murder, Michaels told Dr. Hubbard that he
    felt no remorse. Michaels also told Dr. Hubbard that, if he could do the murder over
    again, he would do a “head and heart murder,” which means to shoot the victim in
    the head and chest, because that would have been “cleaner, better.” Dr. Hubbard
    testified that this statement illustrated a lack of remorse. And remember, Dr.
    Hubbard was the defendant’s psychiatric expert witness.
    Experts from both sides testified that Michaels was a psychopath. Dr. Hubbard
    told the jury that “looking at [Michaels] superficially, one would see a psychopath
    or sociopath.” Two prosecution experts, Dr. Murphy and Dr. Rappaport, diagnosed
    Michaels as having an antisocial personality disorder, and Dr. Murphy’s report noted
    that Michaels behaved in a psychopathic fashion. Both Dr. Hubbard and Dr. Murphy
    7
    agreed that, in general, Michaels was a person who showed no remorse for his
    crimes.
    In addition to the extensive evidence of Michaels’s lack of remorse, the jury
    also heard overwhelming evidence from both the defense and prosecution experts,
    as well as lay witnesses, that Michaels took pleasure in having a reputation as a
    killer. Dr. Hubbard testified that Michaels was a “habitual liar” who “bragged” about
    “his power, his destructiveness and about his evil.” Dr. Hubbard stated that Michaels
    had a “clear-cut pattern” of emphasizing “what a bad guy he is to make him appear
    better or more powerful in the eyes of others and feel better about himself.” Dr.
    Hubbard agreed with the prosecutor’s characterization of Michaels as “a man who
    feels good about himself when he is committing violent and asocial acts.” Dennis
    Lucas testified that, after the murder, he saw Michaels’s “hit list,” and that Michaels
    told him that there were other “jobs to be done and money involved.” Michaels, 
    28 Cal. 4th at 506
    . The record overwhelmingly shows that Michaels proudly cultivated
    his reputation as a killer, even without the confession evidence.
    The confession was redundant evidence for each point the prosecutor used it
    to prove—Michaels’s great love of violence, his graphic descriptions of his
    participation in the murder, and his lack of remorse. And although the defense did
    offer some mitigating evidence, we disagree with the dissent’s conclusion that the
    8
    presence of such evidence made this case so close that the exclusion of the
    confession would have tipped the scales in Michaels’s favor.
    The dissent argues that the jury could have concluded that Michaels’s motive
    for the crime was to protect Christina from Clemons’s physical and sexual abuse,
    and that this was a potential mitigating circumstance. But the jury also heard
    evidence that Michaels was not Christina’s protector, but another abuser. Christina
    herself testified that Michaels was physically violent with her in the past and that
    she was afraid of him.
    The jury also heard ample evidence supporting a financial motive for the
    murder. Dr. Hubbard testified that Christina used her mother’s life insurance policy
    as a “tool of manipulation” to persuade Michaels to commit the murder, showing
    that it was the money, and not protecting Christina, that was his true motivation.
    Before the murder, Michaels told his co-defendant, Popik, that the victim had
    insurance coverage of $100,000 and that the proceeds would help Michaels and
    Christina start a new life. Michaels, 
    28 Cal. 4th at 503, 519
    . Goldenberg testified
    that, eight months before the murder, Michaels called her asking for money. The
    jury heard that Michaels wrote a letter before the murder that said he would do
    “whatever his morals allowed” to provide financial backing for himself and
    Christina.
    9
    On the evening of September 29, just three days before the murder, Michaels
    asked his roommate Mark Hebert if he wanted to go to Escondido to do a “tax,”
    which Hebert explained meant collecting a debt. On the night of the murder,
    Michaels told his roommate Veldina Davis that he was going to Escondido to do a
    “tax.” Davis also testified that Michaels made a statement about knocking off
    Christina’s old lady, and that Christina replied, “then we can get the money.”
    Michaels, 
    28 Cal. 4th at 519
    .
    In fact, the interrogation, which the dissent claims was prejudicial, actually
    supported the defense’s theory of the case and helped rebut the theory that Michaels
    killed Clemons for the money; Michaels told interrogators that he killed Clemons
    “so Chris[tina] would not have to go back with her mother.” When talking about
    Christina’s relationship with her mother during the interrogation, Michaels told the
    officers:
    Her mother’s manic-depressive, and the beatings, abuse, and all
    sorts of bad things, just like in my past. That’s why I don’t care
    to know where my family is, most of them. Just a matter of
    destroyed that little girl. And there was no way I was going to let
    it happen again. It’s gone too fucking far.
    The dissent also points to mitigation evidence of Michaels’s difficult
    childhood and the abuse that he, his sister, and his mother suffered at the hands of
    his father. But the prosecutor skillfully rebutted this point during his closing
    argument:
    10
    The defense seems to be well, Mr. Michaels had a rough
    childhood, so it’s okay that he did what he did. He needed to feel
    like a big man, so it’s okay. It made him feel better to do this.
    Well, lots of us have had tough childhoods. None of us are the
    brutal murderers that Mr. Michaels is. Mr. Michaels’s sister,
    Cher Goldenberg, apparently had a tough childhood, too, and she
    turned out okay. She is a very respectable young woman. She is
    hard working, she is law abiding, she is a young business woman,
    she is not a murderer. Similarly, Mr. Michaels’s mother; she is
    working, she cares for her family, she is a loving and attentive
    murder—mother. She is not a murderer, either.
    There is not a single aggravating factor that the jury could have gleaned from
    Michaels’s confession evidence that was not otherwise proved by ample admissible
    evidence, nor any piece of mitigation evidence that was rebutted by the confession
    that would otherwise have gone unrebutted. Indeed, the confession evidence helped
    support the defense’s own theory that Michaels killed Clemons to protect Christina.
    We hold that Michaels was not prejudiced by the admission of the confession.
    C.     The Popik Note
    We begin our analysis of the cumulative effect of the Popik note on the penalty
    phase from a similar place, and point out that the prosecutor relied on the Popik note
    to an even lesser extent than he did the confession evidence, citing it only twice
    during his entire forty-page closing argument.
    The dissent argues that the Popik note is prejudicial because it was not
    cumulative of evidence of Michaels’s past dangerousness, but rather unique
    evidence of Michaels’s potential for future dangerousness. But, as discussed above,
    11
    the jury heard extensive evidence of Michaels’s potential for future dangerousness,
    including evidence that he had a “hit list” of future murders he wanted to commit for
    money and his great love of violence generally. Dr. Murphy’s report also quoted
    Michaels, while discussing the murder, as saying “I’d do it again but I’d do it
    differently next time. It just didn’t work out the way it should have. Otherwise, it
    would have been an H & H Killing . . . (H & H refers to heart and head). Same thing
    applies to my father. If I ever find him I’ll do an H & H killing on him.” Michaels’s
    own account of his future murderous intent never wavered, and the jury could
    certainly have relied on evidence other than the Popik note to decide that the death
    penalty was proper.
    Given the limited use of the Popik note and its minimal evidentiary value at
    trial, we cannot conclude that it had a prejudicial effect on the jury, even in
    combination with the confession evidence. Accordingly, we reject Michaels’s claim
    of cumulative error as to the admission of his confession and the Popik note.
    II.   Prosecutorial Misconduct
    In Claim Five, Michaels contends that the prosecutor committed four species
    of misconduct during the penalty-phase closing arguments: (1) accusing Michaels
    of participating in devil-worship in violation of Dawson v. Delaware, 
    503 U.S. 159
    (1992), (2) making an improper “thirteenth juror” argument that Michaels himself
    would have voted for the death penalty had he served as a juror in his own trial, in
    12
    violation of Payne v. Tennessee, 
    501 U.S. 808
     (1991), (3) claiming that Michaels
    was a contract killer, and (4) using improper name-calling and emotional appeals in
    violation of Darden v. Wainwright, 
    477 U.S. 168
     (1986). For the reasons discussed
    below, we affirm the district court’s denial of habeas relief on all claims of
    prosecutorial misconduct.
    A.    Background
    During the penalty phase of the trial, the jury heard mitigation evidence that
    Michaels was a member of a Presbyterian church. In response, the prosecutor
    introduced documents found in Michaels’s tackle box, and referenced those
    documents during closing arguments to accuse Michaels of participating in devil-
    worship:
    We also know that Mr. Michaels was a member of a Presbyterian
    church in Big Springs, Texas. And you may consider that to be a
    factor in mitigation. We also know from his tackle box and what
    appears to be that pentagram and the six six six that Mr. Michaels
    had interests in other types of religion, which I think we call devil
    worship, and three sixes is a sign of the beast, and that is Mr.
    Michaels; he is a beast.
    The prosecutor went on to recount the testimony of Michael Brohammer, one
    of Michaels’s childhood friends, and argued to the jury that if Michaels was a juror
    in his own case, he would vote for the death penalty:
    I like to think of Mr. Michaels as the 13th juror in this case
    because if Mr. Michaels were voting on this case, he would vote
    for the death penalty; there is no doubt about it. He believes in
    the death penalty. He told Michael Brohammer when they were
    13
    kids that “if somebody commits a heinous crime and if they
    deserve it and if that is what is to be found the punishment, there
    should be no problem with that. . . . Mr. Michaels would vote for
    the death penalty. He would say “that guy is scary;” he would
    say “that guy is twisted, he is a psychopath, he has ruined a lot
    of lives, he is dangerous, he is dangerous with a knife, with a gun,
    with a pipe bomb he is a would-be mass murderer. How can we
    allow anyone to live whose goal is to kill people? We can’t take
    that chance.” That would be Kurt Michaels on Kurt Michaels, the
    13th juror.
    The prosecutor also argued that Michaels was a contract killer, stating “[t]he
    defense may try to put Christina Clemons back on trial and blame it all on her. But
    ask yourselves why did Christina Clemons pick Kurt Michaels to do this murder.
    Because he was a professional. Because he had a great love for violence.” Borrowing
    from the writings found in Michaels’s tackle box, the prosecutor continued:
    Mr. Michaels is the lone dark wolf. He’s an executioner, he’s a
    justice bringer, he’s a contract killer. He wants to kill a lot of
    people, he’s a shotgun man. He’s a gun runner, he’s into pipe
    bombs. He hires people to work as his assistants, he is a
    psychopath, he brags, he bosses, he robs, he cuts, he abuses, he
    bullies, he murders, and he feels good about it.
    Throughout his closing argument, the prosecutor variously described
    Michaels as a “monster,” a “psychopath,” a “beast,” and “evil.” After showing the
    jury a portion of Michaels’s taped confession, the prosecutor argued, “[t]his is a man
    who expects mercy, this is a man who showed no mercy to anybody.” The prosecutor
    described how the victim must have felt upon waking up to intruders in her home:
    “A primal fear we all have, the idea of waking up and having somebody in our
    14
    bedroom who might hurt us, a stranger. Only it’s two men; one of them is a stranger,
    Popik. The other is a beast, Michaels.”
    Michaels did not object to or move to strike the devil-worship accusations,
    “thirteenth juror” argument, contract-killer rhetoric, or name-calling and emotional
    appeals at trial. On direct appeal, Michaels argued that the prosecutor committed
    misconduct by calling Michaels a “beast” and accusing him of devil worship, but the
    California Supreme Court declined to rule on those issues because they were waived
    for lack of objection at trial. Michaels, 
    28 Cal. 4th at 540
    . Michaels did not argue
    prosecutorial misconduct in his first habeas petition. The California Supreme Court
    rejected the prosecutorial misconduct claim in Michaels’s second habeas petition
    summarily on the merits and as procedurally barred. The district court acknowledged
    that the California Supreme Court held that the prosecutorial misconduct claim was
    procedurally defaulted but denied habeas relief on the merits. We take the same
    approach here. See Franklin v. Johnson, 
    290 F.3d 1223
    , 1232 (9th Cir. 2002)
    (“Procedural bar issues are not infrequently more complex than the merits issues
    presented by the appeal, so it may well make sense in some instances to proceed to
    the merits if the result will be the same.”).
    B.     Standard of Review
    15
    The California Supreme Court rejected Michaels’s prosecutorial misconduct
    claim as procedurally barred and also rejected it on the merits. Michaels’s claim is
    therefore subject only to deferential review under AEDPA. 
    28 U.S.C. § 2254
    (d)(1).
    C.    Discussion
    To decide if improper comments give rise to a constitutional violation, “the
    relevant question is whether the prosecutors’ comments ‘so infected the trial with
    unfairness as to make the resulting conviction a denial of due process.’” Darden,
    
    477 U.S. at 181
     (1986) (quoting Donnelly v. DeChristoforo, 
    416 U.S. 637
    , 643
    (1974)). This standard is difficult to meet under AEDPA, requiring Michaels to
    “establish that the [state] Supreme Court’s rejection of the Darden prosecutorial
    misconduct claim ‘was so lacking in justification that there was an error well
    understood and comprehended in existing law beyond any possibility for fairminded
    disagreement.’” Parker v. Matthews, 
    567 U.S. 37
    , 47 (2012) (quoting Harrington v.
    Richter, 
    562 U.S. 86
    , 103 (2011)).
    1.     Devil-Worship Comments
    Turning first to the accusations of devil-worship, Michaels’s claim of
    prosecutorial misconduct relies on a misreading of Dawson. In that case, a jury
    convicted the defendant of first-degree murder after he escaped from prison and
    robbed and killed a homeowner. Dawson, 
    503 U.S. at 161
    . During the penalty phase
    of the trial, the jury heard evidence that the defendant was a member of the Aryan
    16
    Brotherhood. 
    Id. at 162
    . The jury recommended the death penalty, which the trial
    court was required to impose under Delaware law. 
    Id. at 163
    . The Supreme Court
    held that the First and Fourteenth Amendments prohibit a state from “employing
    evidence of a defendant’s abstract beliefs at a sentencing hearing when those beliefs
    have no bearing on the issue being tried.” 
    Id. at 168
    . Michaels argues that his case is
    analogous to Dawson because the devil-worship evidence was evidence of an
    abstract belief that had no bearing on penalty-phase issues. We disagree.
    Dawson tells us that “just as the defendant has the right to introduce any sort
    of relevant mitigating evidence, the State is entitled to rebut that evidence with proof
    of its own.” 
    Id. at 167
    . Here, the jury heard mitigating evidence from Michaels’s
    pastor that Michaels was a member of a Presbyterian church. The evidence of devil-
    worship was not “employed simply because the jury would find these beliefs morally
    reprehensible,” 
    id.,
     but to rebut Michaels’s mitigation evidence of his Presbyterian
    church membership. And indeed, that is precisely how the prosecutor framed the
    devil-worship evidence, juxtaposing it with Michaels’s mitigating evidence: “We
    also know that Mr. Michaels was a member of a Presbyterian church in Big Springs,
    Texas. And you may consider that to be a factor in mitigation. We also know from
    his tackle box . . . that Mr. Michaels had interests in other types of religion, which I
    think we call devil worship . . . .” The prosecutor did not commit misconduct by
    arguing Michaels’s interest in devil-worship to the jury based on his own tackle box
    17
    writings and for the proper purpose of rebutting the mitigating evidence of his
    membership in the Big Springs, Texas Presbyterian Church.
    2.    The “Thirteenth Juror” Argument
    Michaels’s prosecutorial misconduct claim based on the “thirteenth juror”
    argument similarly fails. In Payne, the Supreme Court overruled a prior decision,
    Booth v. Maryland, 
    482 U.S. 496
     (1987), to the extent that Booth held “that evidence
    and argument relating to the victim and the impact of the victim’s death on the
    victim’s family are inadmissible at a capital sentencing hearing.” 
    501 U.S. at 830
    ,
    830 n.2. However, the Court left intact Booth’s ban on the “admission of a victim’s
    family members’ characterizations and opinions about the crime, the defendant, and
    the appropriate sentence” as violative of the Eighth Amendment. 
    Id.
     at 830 n.2.
    Michaels argues that evidence of his belief in the death penalty violated Booth’s ban
    on “opinions about the crime,” and that the prosecutor’s argument, that Michaels
    would have voted for the death penalty in his own case, was not a reasonable
    inference from the testimony the jury heard from Brohammer. We reject each
    argument.
    First, Booth is distinguishable from Michaels’s case. There, the Supreme
    Court held that the “introduction of a [victim impact statement] at the sentencing
    phase of a capital murder trial violates the Eighth Amendment.” Booth, 
    482 U.S. at 509
    . In one victim impact statement, a family member stated that “such a person” as
    18
    the defendant could “‘[n]ever be rehabilitated.’” 
    Id. at 500
    . But in Michaels’s case,
    the jury did not hear a victim impact statement, but evidence of the defendant’s own
    opinion. To accept Michaels’s argument would thus require an extension of Booth
    and “‘if a habeas court must extend a rationale before it can apply to the facts at
    hand,’ then by definition the rationale was not ‘clearly established at the time of the
    state-court decision.’” White v. Woodall, 
    572 U.S. 415
    , 426 (2014) (quoting
    Yarborough v. Alvarado, 
    541 U.S. 652
    , 666 (2004)). Given the deferential standard
    required by AEDPA and the limited holding of Booth, we cannot hold that clearly
    established federal law prohibited the admission of the defendant’s own views of the
    suitability of the death penalty during the sentencing phase of the trial.
    Second, prosecutors are allowed “to strike hard blows based on the evidence
    presented and all reasonable inferences therefrom.” Ceja v. Stewart, 
    97 F.3d 1246
    ,
    1253 (9th Cir. 1996) (quoting United States v. Baker, 
    10 F.3d 1374
    , 1415 (9th Cir.
    1993)). Here, the prosecutor’s “thirteenth juror” argument was rooted in testimony
    that the jury heard at trial. Brohammer testified that Michaels’s opinion of the death
    penalty was that “if somebody commits a heinous crime, that if they deserve it, and
    if that is what is found to be the punishment, then there should be no problem with
    it.” Although Michaels disagrees with what the prosecutor said, the prosecutor did
    not unreasonably infer from the testimony that, having been found guilty of a serious
    crime, Michaels would have voted for the death penalty in his own case. It is also a
    19
    stretch to say that the prosecutor was making unfair factual inferences from
    Brohammer’s testimony. As it goes without saying that Michaels would not be
    allowed to serve as a juror in his own case, it is clear that the point was purely
    rhetorical—not factual.
    3.     The “Contract Killer” Argument
    Michaels also faults the prosecutor for describing Michaels as a
    “professional” and a “contract killer.” During the penalty phase of the trial, the
    prosecutor, over Michaels’s objection, offered for admission into evidence a piece
    of paper found on Michaels during a prior arrest that the prosecutor claimed was a
    “hit list.” The piece of paper had the words “hit list” written on it repeatedly, along
    with several names. The court allowed the document to be admitted into evidence
    for the limited purpose of showing Michaels’s perception of himself as a hit man
    and “that he had a street reputation that he wanted to protect,” and not for the purpose
    of showing that he had actually committed other murders. Michaels argues that when
    the prosecutor described Michaels as a “professional” and a “contract killer” during
    his closing argument, he breached his representation to the court and used the
    evidence for an improper purpose.
    The government argues in response that Michaels waived his portrayal as a
    contract-killer as an issue on appeal by failing to argue it before the district court.
    See United States v. Robertson, 
    52 F.3d 789
    , 791 (9thCir. 1994) (“Issues not
    20
    presented to the district court cannot generally be raised for the first time on
    appeal.”). It is true that Michaels’s habeas petition did not allege, in the section on
    prosecutorial misconduct, that the prosecutor wrongfully accused Michaels of being
    a contract killer. However, in another section of his habeas petition, in which
    Michaels faults Chambers for failing to object to comments made by the prosecutor
    during the penalty-phase closing arguments, Michaels argues that “during closing
    arguments, the prosecutor argued that Mr. Michaels was a professional killer and a
    contract killer. The prosecutor knew that this was not true. Such argument
    constituted serious misconduct, and Chambers did not object.”
    We agree with Michaels that this language and argument was sufficient to
    preserve the issue for appeal. However, this does not change the outcome of
    Michaels’s case, as we do not agree that the prosecutor crossed into the proscribed
    territory of arguing that Michaels had committed other murders. Indeed, at no point
    did the prosecutor argue that Michaels was responsible for or intended to commit
    the murder of any of the people who appeared on the hit list. Instead, the prosecutor’s
    arguments were made in the context of quoted material from Michaels’s own
    writings, including other fanciful perceptions of himself as a “lone dark wolf,” an
    “executioner,” “the bearer of the sword,” and “the justice bringer.” The prosecutor
    was not literally stating that Michaels was any of these things, but rather limited his
    argument to what he promised the judge—evidence of Michaels’s self-perception.
    21
    Furthermore, even if the prosecutor’s argument was ambiguous, though the
    “consistent and repeated misrepresentation of a dramatic exhibit in evidence may
    profoundly impress a jury . . . . [i]solated passages of a prosecutor’s argument, billed
    in advance to the jury as a matter of opinion not of evidence, do not reach the same
    proportions. . . . [A] court should not lightly infer that a prosecutor intends an
    ambiguous remark to have its most damaging meaning or that a jury, sitting through
    lengthy exhortation, will draw that meaning from the plethora of less damaging
    interpretations.” Donnelly, 
    416 U.S. at 646-47
    . Here, the jury was instructed that
    counsel’s arguments were not evidence, and the references to Michaels as a contract
    killer were minimal, appearing on only two pages of a nearly forty-page closing
    argument. These isolated comments do not constitute the “sort of egregious
    misconduct . . . [that] amount[s] to a denial of constitutional due process.” 
    Id.
     at 647-
    48.
    4.     Name-Calling and Emotional Appeals
    Michaels’s fourth and final claim of prosecutorial misconduct rests on the
    prosecutor’s use of name-calling and emotional appeals during the closing argument.
    In Darden, 
    477 U.S. at 179-82
    , the Supreme Court condemned the prosecutor’s
    closing argument because: (1) he called the defendant an animal, (2) he placed blame
    for the murder on the department of corrections for allowing the defendant a furlough
    from the prison on the weekend of the murder, and (3) he argued that the death
    22
    penalty would be the only way to prevent a future crime. However, placed in the
    context of the entire trial, including the judge’s instructions to the jury that attorneys’
    arguments are not evidence, and the overwhelming evidence of guilt against the
    defendant, the Court held that these comments did not constitute a denial of due
    process. 
    Id. at 181-83
    . In Fields v. Woodford, 
    309 F.3d 1095
    , 1109 (9th Cir. 2002),
    the court held that the prosecutor’s description of the attack from the point of view
    of the victim was misconduct. But the argument did not render the trial
    fundamentally unfair because of the jury instructions and because, “if he had
    delivered exactly the same speech in the third person, it would have been proper.”
    
    Id.
     (internal quotation marks omitted).
    Michaels’s case bears some resemblance to both Darden and Fields. Like
    Darden’s description of the defendant as an animal, here, the prosecutor called
    Michaels a “beast,” a “monster,” a “psychopath,” and “evil.” As in Fields, the
    prosecutor here also violated the “golden rule” by asking the jurors to step into the
    mindset of the victim: “A primal fear we all have, the idea of waking up and having
    somebody in our bedroom who might hurt us, a stranger. Only it’s two men; one of
    them is a stranger, Popik. The other is a beast, Michaels.” But like in Darden and
    Fields, we must similarly conclude that Michaels’s trial was not rendered
    fundamentally unfair by the prosecutor’s comments.
    23
    We are required to evaluate the prosecutor’s comments within the context of
    the entire trial. Donnelly, 
    416 U.S. at 439
    . As discussed at length above, the jurors
    heard extensive evidence throughout the trial of Michaels’s brutality. As above
    noted, of the forty-page closing argument, the prosecutor described Michaels’s
    criminal history for nearly eleven pages, while the improper emotional appeal took
    place on only one page. As in Fields, the prosecutor’s fault in using the collective
    “we” while describing the events of the murder was minimal, given that the rest of
    the prosecutor’s account of the attack was properly in the third person. The jurors
    heard testimony about Michaels’s lack of regret for the murder and possible
    psychopathy, and the trial judge instructed the jurors that the attorneys’ arguments
    were not evidence. Given the context of the entire trial and the deferential standard
    of review required under AEDPA, we do not agree that the prosecutor’s limited
    improper comments constituted a due process violation.
    III.   Ineffective Assistance of Advisory Counsel
    In Claim Ten, Michaels argues that he is entitled to effective assistance of
    advisory counsel. In Claim Eleven, Michaels argues that Chambers was ineffective
    at both the guilt and penalty phases because Chambers failed to call as a witness
    Christina’s father, who would have corroborated Christina’s testimony about how
    her mother physically abused her. In Claim Twelve, Michaels argues that Chambers
    was ineffective at the penalty phase because Chambers failed adequately to
    24
    investigate and present evidence: (1) that Michaels’s mother was bipolar, (2) that
    Michaels’s mother physically and emotionally abused him throughout his childhood,
    and (3) that Michaels’s methamphetamine use was affected by his long-term brain
    damage, difficult background, and mental illness. Because we hold that Chambers
    did not render ineffective counsel, we need not decide the threshold question
    whether Michaels had a right to effective assistance of nominally advisory counsel
    where, as here, counsel actually conducted the entire trial, including the penalty
    phase, and made all pertinent decisions.
    A.     Background
    Michaels’s trial began in April 1990. Before trial, in January 1990, Michaels
    filed two motions to remove his appointed attorney, Grossberg. Grossberg also
    moved to be relieved from the case, claiming that Michaels “can’t have a fair trial
    as long as I’m his lawyer.” The court denied each motion, and Michaels brought a
    new Faretta motion to represent himself. On February 5, 1990, Grossberg renewed
    his motion to be relieved as counsel, citing a “complete breakdown” in the attorney-
    client relationship. The court denied the motion but agreed to have Chambers,
    Michaels’s other appointed attorney, serve as lead counsel in place of Grossberg.
    During this hearing, the court asked Michaels whether he wanted to pursue his earlier
    motion to represent himself under Faretta v. California, 
    422 U.S. 806
     (1975).
    Michaels stated that he wanted to represent himself. The court granted the Faretta
    25
    motion after it found Michaels was competent and the waiver of the right to counsel
    knowing, intelligent, and voluntary. The court then appointed Chambers and
    Grossberg as advisory counsel.
    During the guilt and penalty phases, Chambers conducted the entire defense
    case, including voir dire, examination of witnesses, opening statements, and final
    argument. In a post-conviction declaration, Chambers stated that he “made all of the
    decisions regarding the defense,” including the strategy, scope of investigation,
    witnesses to call, and specific questions to ask the witnesses.
    During the guilt phase, the defense argued that Michaels killed Clemons to
    protect Christina. In support of this theory, the defense relied heavily on Christina’s
    testimony about the severe physical and sexual abuse Christina’s mother inflicted
    upon her. The prosecution argued that the murder was primarily financially
    motivated, so Christina and Michaels could get Clemons’s life insurance proceeds.
    The jury found Michaels guilty.
    During the penalty phase, the defense offered mitigating evidence that
    Michaels himself was abused by his father, Lynn Miller. Lynn had a drinking
    problem and became violent towards his family when he drank. When Michaels was
    three years old, he and his mother witnessed Lynn sexually abuse his six-year-old
    sister. This incident caused Michaels’s mother to take the children and leave Lynn.
    26
    Lynn continued to harass the family by tracking them down when they moved,
    finding the kids on the street, and calling their home to make threats.
    When Michaels was thirteen, his mother was raped. A few years later, his
    sister was raped as well. According to his mother and sister, Michaels became
    extremely angry upon learning about these incidents and felt helpless. Michaels’s
    mother later began working for a rape hotline and often took calls from home.
    Michaels was proud of his mother’s work and showed concern for the wellbeing of
    the victims. Michaels’s sister testified, “If [Michaels] was involved in this murder,
    it was because Christin[a] came into his life and that was just one more woman that
    he could not help. I feel like the helplessness that he felt all his life had just primed
    him, and when Christin[a] walked into his life, he wasn’t going to let it happen to
    somebody else that he loved.”
    The evidence also showed that Michaels’s mother, Barbara Wilson, was
    generally supportive and kind. Michaels’s sister, Cheryl, testified that Barbara was
    warm, open, and caring, and was always there when her children needed her. Cheryl
    testified that Barbara “wanted to make sure that we always felt safe and secure in
    our home and that nobody could take that away from us.” Based on the evidence
    presented by the defense, the prosecution argued that, despite Michaels’s difficult
    early childhood, Michaels grew up in a relatively comfortable environment.
    27
    In its final argument, the prosecution undermined the defense’s mitigation
    strategy, commenting that “the defense now at the penalty phase seems to be
    [Clemons] really got what she deserved, and, gee, the poor guy, Mr. Michaels, he
    had a rough childhood, he was a victim of playing too much dungeons and dragons.”
    The prosecution also drew attention to the evidence portraying Michaels’s family
    background in a positive light: “I think . . . that we could say . . . he’s got a very nice
    family. His mother appeared to be a very wonderful person; so did his sister. His
    stepfather appeared to be a good man. They all tried to help Mr. Michaels out, they
    all tried to present a positive influence on him, and Mr. Michaels turned his back on
    that support and on that family.” After three days of deliberation, the jury returned a
    death sentence.
    During habeas proceedings, Michaels presented additional evidence regarding
    his childhood and family background and argued that this evidence should have been
    introduced at trial. Notably, his sister Cheryl told quite a different story about her
    and Michaels’s childhood than she had at trial: rather than “warm” and “always
    there” for her children, Cheryl stated that their mother was both physically and
    emotionally abusive toward Michaels throughout Michaels’s childhood. Michaels’s
    mother, Barbara Wilson, had a long history of mental illness and was eventually
    diagnosed with bipolar disorder. In a post-conviction declaration, mental health
    expert, Dr. Stotland, stated that Michaels had long-term brain damage, which
    28
    affected him for his entire life. According to Michaels, advisory counsel Chambers’s
    failure to investigate and present evidence of his difficult upbringing provided the
    jury with an inaccurate depiction of Michaels’s life.
    Michaels did not raise these issues regarding ineffective assistance by
    Chambers on direct appeal. Michaels, 
    28 Cal. 4th at
    526–27, 539–40. In his first and
    second state habeas petitions, the California Supreme Court denied Michaels’s
    ineffective assistance of counsel claims summarily on the merits. The district court
    also denied Michaels’s ineffective assistance of advisory counsel claims.
    B.     Standard of Review
    The California Supreme Court rejected Michaels’s ineffective assistance of
    advisory counsel claims on the merits. These claims are therefore subject to
    deferential review under AEDPA. Section 2254(d)(1).
    C.     Discussion
    To state a claim for ineffective assistance of counsel, a convicted defendant
    must show: (1) that counsel’s performance was deficient, and (2) that the deficient
    performance prejudiced the defense. Strickland v. Washington, 
    466 U.S. 668
    , 687
    (1984). For the first prong, the court asks “whether counsel’s assistance was
    reasonable considering all the circumstances.” 
    Id. at 688
    . For the second prong, the
    court asks “whether there is a reasonable probability that, absent the errors, the
    29
    sentencer . . . would have concluded that the balance of aggravating and mitigating
    circumstances did not warrant death.” 
    Id. at 695
    .
    Because Michaels’s ineffective assistance of advisory counsel claims are
    subject to deferential review under AEDPA, the proper inquiry is whether the
    California Supreme Court unreasonably applied the Strickland standard. Harrington
    v. Richter, 
    562 U.S. 86
    , 101 (2011). Where, as here, the state court rejects a habeas
    petitioner’s claims summarily rather than in a reasoned opinion, the petitioner must
    show that there was “no reasonable basis for the state court to deny relief.” 
    Id. at 98
    .
    The court “must determine what arguments or theories . . . could have supported the
    state court’s decision . . . [and] whether it is possible fairminded jurists could
    disagree that those arguments or theories are inconsistent with” prior decisions of
    the Supreme Court. 
    Id. at 102
    . Put another way, “[t]he question is whether there is
    any reasonable argument that counsel satisfied Strickland’s deferential standard.” 
    Id. at 105
    .
    1. Testimony of Christina’s Father
    Michaels argues that Chambers should have introduced the testimony of
    Christina’s father, Wendell Clemons, to corroborate Christina’s testimony that her
    mother abused her. Christina was tried in juvenile court in November and December
    1988 for her role in JoAnn Clemons’s death. Wendell testified at Christina’s juvenile
    court trial that JoAnn Clemons inflicted violence on Christina, and Michaels argues
    30
    that Chambers was deficient for failing to elicit similar testimony at his own trial.
    We hold that the California Supreme Court could have reasonably determined that
    the failure to introduce such evidence did not constitute deficient performance.
    We first address Michaels’s argument that the omission of Wendell’s
    testimony was per se deficient because Chambers admitted that it was not a tactical
    decision, and he simply did not think to introduce the evidence. Michaels relies on
    Doe v. Ayers, 
    782 F.3d 425
    , 444–45 (9th Cir. 2015) for the proposition that an
    attorney’s performance is necessarily deficient when he admits that a particular
    action or inaction was not a strategic decision. Michaels’s reliance on Doe is flawed
    because he misstates the holding in Doe, the claims in Doe were not subject to
    AEDPA, and the facts of Doe are distinguishable from those of the present case. 
    Id. at 429
    , 444–46.
    In Doe, the petitioner sought habeas relief for ineffective assistance of counsel
    at his criminal trial. 
    Id. at 429
    . In preparation for the penalty phase, defense counsel
    did not obtain readily available mitigating evidence, conducted only perfunctory
    interviews with the defendant, did not inquire about the defendant’s history of
    trauma, did not follow up with the retained psychological expert, and did not prepare
    the penalty-phase witnesses for trial. 
    Id.
     at 435–43. Defense counsel conceded that
    this conduct was the result of inattention rather than strategy, stating, “[I]t’s hard for
    me to say what my [penalty-phase] strategy was.” 
    Id. at 444
    . The court found the
    31
    attorney’s conduct deficient based on overwhelming evidence of poor performance,
    including the attorney’s admission that he had no strategy. 
    Id. at 445
    . The opinion
    states, “The presumption that the defense counsel’s conduct falls within the wide
    range of reasonable professional assistance is inapposite . . . when we know for sure
    that defense counsel had no strategy, because he has unequivocally said as much.”
    
    Id. at 444
    .
    Doe addressed a situation where the defense attorney had no penalty-phase
    strategy. It did not hold, as Michaels suggests, that an attorney must consider every
    possible item of mitigating evidence and make an affirmative decision whether to
    include each item. Such a holding would be contrary to the objective nature of the
    Strickland standard. Strickland, 
    466 U.S. at 688
    ; Richter, 
    562 U.S. at 109
     (explaining
    that counsel need not “confirm every aspect of the strategic basis for [his] actions”
    because “Strickland . . . calls for an inquiry into the objective reasonableness of
    counsel’s performance, not counsel’s subjective state of mind”).
    Doe is also distinguishable from the present case. Here, the record shows that
    Chambers prepared for trial by setting the scope of investigation, interviewing
    members of Michaels’s family, preparing witnesses to testify, retaining multiple
    mental health experts, making decisions as to which arguments to make and not
    make, and requesting continuance to allow for further preparation. Chambers’s
    behavior is therefore not analogous to that of the attorney in Doe, who lacked a
    32
    penalty-phase strategy altogether. Accordingly, the fact that Chambers admitted that
    he did not consider calling Wendell as a witness does not render the omission per se
    deficient.
    We next address whether there is a reasonable basis to find that the omission
    of Wendell’s testimony was not deficient. At Christina’s juvenile court trial for her
    role in Clemons’s death, Wendell testified that Clemons would beat Christina until
    Clemons was tired. Wendell testified,
    When [Christina] didn’t cry, [JoAnn] just kept going and going and going.
    Later on . . . she would stop beating her with something and just start
    pummeling her with her fist, beating her about the head and shoulders with
    her fist . . . . She would beat her on the floor. Then she would kick her. And
    then she would beat her some more. And then she would pick up something
    [else] to beat her until she just got too tired to beat her any more.
    When Clemons was too tired to beat Christina, she had Wendell beat her. He
    complied because he was afraid of Clemons, who threatened to kill him and regularly
    attacked him with knives and other objects.
    Wendell’s testimony is undoubtedly powerful. Christina, however, provided
    her own powerful testimony at Michaels’s trial. During the guilt phase, Christina
    testified to the details of abuse she had relayed to Michaels. She told Michaels that
    her mother physically and sexually abused her. She said that her mother would
    become violent and then inappropriately touch her. Christina also told Michaels that
    she was at one point removed from her home by child protective services because of
    her mother’s abuse. She told him about a camping trip during which her mother hit
    33
    her with a cast iron pot that had been heating on a fire grate, then later performed
    sexual acts on Christina, including penetration and oral copulation. Christina also
    told Michaels about a particularly bad fight in which Clemons choked Christina so
    hard that Christina thought she would die and then severely beat her. Christina
    testified to all these details at trial, and the trial judge instructed the jury to limit the
    testimony to the impact it would have on Michaels and not consider the truth of the
    underlying allegations of abuse.
    Michaels argues that corroboration of this testimony was crucial because
    Christina’s credibility was undermined by the prosecution and her testimony was
    limited to its effect on Michaels. But whether the abuse actually occurred was not at
    issue in the case, and corroboration was relevant only to the extent that it could help
    the jury determine if Michaels’s belief that Christina was abused was sincere. United
    States v. James, 
    169 F.3d 1210
     (9th Cir. 1999) (en banc).1 Given that Christina
    testified in front of the jury as to the stories she told Michaels, the jury had its own
    1
    Michaels cites James for the proposition that corroborating evidence is “crucial.”
    In James, the issue was whether court records corroborating violent stories the
    victim told the defendant were relevant to the defendant’s self-defense claim, and
    therefore admissible. The court found such evidence relevant for the purposes of
    (1) proving that the defendant did not make up the stories and (2) proving that the
    defendant heard the stories from a man who had actually committed the acts
    described, and was therefore more likely to believe his descriptions. In the present
    case, there is no question that Christina actually told Michaels stories about her
    abuse. The only relevance of the corroborating evidence is that it would have
    tended to prove Christina was convincing when she described her abuse to
    Michaels, and thus that Michaels’s belief that the abuse happened was genuine.
    34
    opportunity to evaluate the persuasiveness of these stories. It was therefore less
    important that Christina’s stories be corroborated than in cases involving stories told
    by persons unavailable at trial. See, e.g., 
    id. at 1214
     (holding that evidence
    corroborating violent stories told to the defendant by the deceased victim was
    relevant to the defendant’s self-defense claim because it tended to prove that the
    defendant’s fear of the victim was genuine). Also, other than general attacks on
    Christina’s credibility, there was no evidence tending to prove that Christina’s
    mother did not abuse her. Corroboration was thus not particularly important.
    In support of his argument that corroboration was crucial, Michaels asserts
    that the trial judge commented that the abuse evidence did not make Michaels’s
    beliefs reasonable. Michaels refers to the trial judge’s statement that, “Although the
    defendant felt he could protect Christina Clemons by murdering her mother . . . the
    court does not find his reaction by homicide a reasonable belief, despite feelings that
    he himself felt justified.” According to Michaels, this statement asserts that the court
    did not find his belief that Christina was abused to be reasonable, rendering
    corroborating evidence necessary. Michaels distorts the trial judge’s statement. The
    plain meaning of the statement is that Michaels’s belief that murder was justified
    was unreasonable. Nothing in the trial court’s language implies that Michaels did
    not have a genuine belief that Christina was the subject of abuse.
    35
    Moreover, the jury did hear evidence tending to prove that Michaels’s belief
    that Christina was abused was reasonable. Dr. Hubbard testified that he himself
    believed Christina had been sexually abused. He based this opinion on information
    told to him by Christina, information documented by doctors, social workers, and
    psychologists, and observations from his clinical psychiatric assessment of
    Christina. For example, Christina preferred bondage and abuse during sex, which,
    according to Dr. Hubbard, is typical of individuals who have been sexually abused.
    Thus, although the jury did not hear from anyone who witnessed the abuse of
    Christina first-hand, it was presented with evidence tending to corroborate her
    history.
    Michaels also argues that corroboration was crucial because the prosecution
    undermined Christina’s credibility. Again, the issue is not whether Christina was
    telling the truth when she testified at trial to the abuse inflicted upon her by her
    mother, or whether she was telling the truth when she told Michaels about this abuse.
    The issue is whether Christina actually told Michaels that she was abused by her
    mother, and whether Michaels believed her. The fact that Christina told Michaels
    about her mother’s abusive behavior and the fact that Michaels believed her were
    corroborated by Dr. Hubbard, who testified that Michaels saw Christina as “a woman
    . . . who had been extensively abused.” Thus, to the extent that it would prove
    36
    Christina told Michaels that she was abused, Wendell’s testimony would be
    cumulative.
    Although additional corroborating evidence may have strengthened a
    determination that Michaels’s belief in the abuse was genuine, and in turn
    strengthened a determination that Michaels’s purported motivation to kill Clemons
    to protect Christina was genuine, the absence of such evidence did not deprive the
    jury from considering this theory of mitigation—Christina’s own testimony was
    adequate to the task. Moreover, that Wendell did not testify at Christina’s trial to any
    sexual abuse by Christina’s mother further reduces the importance of Wendell’s
    corroborative testimony because a central theme of Michaels’s defense was his self-
    image as a protector of women against sexual abuse specifically. See infra Section
    III.C.3.
    Given the limited probative value of Wendell’s testimony, the California
    Supreme Court could have reasonably concluded that the failure to produce such
    testimony was not “outside the wide range of professionally competent assistance.”
    Strickland, 
    466 U.S. at 690
    ; Babbitt v. Calderon, 
    151 F.3d 1170
    , 1174 (9th Cir.
    1998) (holding that it was within reason for counsel not to pursue additional
    testimony that would have been largely cumulative of the testimony offered at trial).
    2. Bipolar Disorder
    37
    Michaels argues that Chambers was deficient for failing to present evidence
    of Michaels’s mother Barbara’s bipolar disorder, because Barbara’s mental illness
    could have been discovered by a proper investigation. This argument is unsupported
    by the record. First, Michaels has not shown that Barbara’s bipolar disorder had been
    diagnosed at the time of trial. In support of his claim, he offers only a 1998
    declaration of mitigation specialist Ellen Rogers, who was engaged post-trial for the
    habeas proceedings, declaring that Barbara believed she suffered from bipolar
    disorder for many years but was diagnosed only “recently.” Remember, Michaels’s
    trial took place eight years earlier, in April 1990. Rather than establish that Barbara’s
    bipolar disorder was known at the time of trial, Ellen Rogers’s declaration suggests
    the contrary.
    Second, Michaels has not shown that Chambers was on notice that Barbara
    might have had bipolar disorder or a similar condition. In her 1998 declaration,
    Rogers states that Barbara began to take anti-depressants as early as 1981, was
    hospitalized for depression in 1982, and attempted suicide at age 19. The declaration
    notes that Barbara did not receive medical attention following the suicide attempt,
    so it is unclear whether this attempt was documented at the time of trial. Regardless,
    these facts do not tend to prove the fact that Barbara’s bipolar disorder was known
    at the time of trial or that Chambers was on notice that further investigation into
    Barbara’s mental health would have uncovered additional mental illnesses. Rather,
    38
    these facts are consistent with a finding that Barbara was merely depressed.
    Accordingly, the California Supreme Court could have reasonably found that
    Chambers was not deficient in failing to inquire further into Barbara’s mental health.
    See Babbitt at 1174 (holding that counsel was not ineffective for failing to uncover
    a family mental illness where, after a reasonable investigation, nothing had put
    counsel on notice of the illness).
    3. Childhood Abuse
    At trial, Michaels’s sister Cheryl testified that their mother Barbara was “a
    very warm, open and caring mom” who “was there whenever we needed her” and
    “forfeited a lot of her own, quality personal time to dedicate to us and make sure that
    we didn’t want for anything.” Barbara testified that the abuse inflicted by her
    husband upon Michaels in his early childhood ended when Michaels was three years
    old. She denied doing anything more than spanking Michaels and testified that
    anything Michaels said to the contrary was false.
    During habeas proceedings, Cheryl changed her story and declared that
    Barbara “did far more than spank” her children. Cheryl declared that Barbara
    frequently “lost control” and “beat [her children] until she was tired,” once breaking
    a hairbrush on Michaels. In addition, Barbara emotionally abused Michaels by
    blaming all her problems on him, telling him she wished she never had him,
    comparing him to his abusive father, and threatening to leave him forever. Cheryl
    39
    declared that she did not tell the investigators or Chambers about her mother’s
    abusive behavior prior to the trial because they did not ask her many questions about
    Barbara and because she felt a need to protect her mother.
    Michaels argues that Chambers’s failure to introduce evidence of Barbara’s
    abusive behavior was deficient because Chambers admitted that he did “not consider
    trying to show that [Michaels’s] mother physically and psychologically abused her
    son because [he] did not have enough background on her and . . . did not have enough
    time to develop such background.” According to Michaels, Chambers admitted in
    this statement that his failure was not a tactical decision, so the court must not apply
    a presumption of reasonableness.2
    Michaels mischaracterizes the facts. Chambers did not assert that he had no
    strategy for the penalty phase or that he had no strategy for investigating Michaels’s
    background. Rather, Chambers declared that he specifically did not pursue an
    investigation of Barbara’s parenting because he did not have the time to develop the
    necessary background. Part of an attorney’s job is to allocate time and resources in
    preparing a defense, and limitations on time and resources must be considered when
    evaluating the reasonableness of an attorney’s conduct. Strickland, 
    466 U.S. at
    691
    2
    Michaels once again relies on a misstatement of the holding in Doe to argue that
    the court should not apply a presumption of reasonableness to Chambers’s conduct
    because of a claim that Chambers had no strategy at all for the penalty phase. This
    argument fails for the reasons stated in Section III.C.1.
    40
    (“[S]trategic choices made after less than complete investigation are reasonable
    precisely to the extent that reasonable professional judgments support the limitations
    on investigation.”).
    Chambers had limited time to develop a strategy after the trial court denied
    the defense’s request for a six-month continuance. Given the limitations on his
    defense, Chambers had to decide which investigations would be most useful. One of
    Chambers’s considerations was his impression that Barbara did not want to disclose
    her past, an impression corroborated by daughter Cheryl’s testimony at trial of
    Barbara’s caring attention to Michaels. In contrast, Chambers was able to elicit
    ample testimony from both Barbara and Cheryl as to the sexual abuse suffered by
    the women in Michaels’s life and the helplessness Michaels felt for being unable to
    protect them, leading to his protective feeling toward Christina. We agree with the
    district court that focusing investigative resources on these fertile areas of mitigating
    evidence was a sound strategy. See Richter, 
    562 U.S. at 107
     (“An attorney can avoid
    activities that appear ‘distractive from more important duties.’” (quoting Bobby v.
    VanHook, 
    558 U.S. 4
    , 11 (2009) (per curiam))). Taking into account all
    circumstances, as Strickland requires, it would not be unreasonable to conclude that
    Chambers’s decision not to investigate further into Barbara’s abusive conduct was
    reasonable.
    4. Drug Use and Brain Damage
    41
    Michaels faults Chambers for failing effectively to tie evidence of Michaels’s
    drug abuse to his background and offense conduct. “Had [Chambers] conducted a
    proper investigation,” Michaels argues, “[he] could have presented a much more
    compelling mitigation presentation that Mr. Michaels had struggled with long-term
    and significant brain damage for his entire life, likely caused by the beatings he
    suffered as a young child, and he was genetically predisposed to mental illness and
    addiction, and began to self-medicate with methamphetamine as a means of coping
    with the trauma of his life.”
    Much of this argument fails for the same reasons discussed in Section III.C.3.
    Namely, these assertions rest on the notion that Chambers should have conducted a
    more extensive investigation into Michaels’s background, but there is a reasonable
    argument that Chambers’s investigation was not deficient given the time limitations
    on the defense. Michaels asserts that Chambers should have investigated the abuse
    Michaels suffered during his childhood, the mental illnesses that ran in Michaels’s
    family, and the history of addiction in Michaels’s family. Similarly, Michaels argues
    that Chambers should have retrieved certain social and medical records for the
    purpose of sufficiently informing the mental health experts. But Michaels has not
    shown that Chambers’s decisions regarding how to allocate investigative resources
    were unreasonable under the circumstances.
    42
    We reiterate that Chambers did not fail to conduct any investigation into or
    present any evidence of Michaels’s childhood. Michaels’s mother and sister both
    testified to the abuse and harassment inflicted on the family by Michaels’s father,
    the financial difficulties the family faced during Michaels’s childhood, as well as
    Barbara’s weight problem and its effect on the family. Multiple witnesses testified
    that Michaels was a lonely child who had trouble making friends. Dr. Hubbard
    testified that Michaels was depressed during his childhood and tried to commit
    suicide at age eleven, which, in his opinion, showed that Michaels was “emotionally
    disturbed” from having grown up in a “disastrous family setting.”
    Chambers also investigated and presented evidence of Michaels’s mental
    health and drug use, retaining multiple mental health experts at the time of trial,
    including psychologist Dr. Stotland to perform testing and evaluation, and
    psychiatrist Dr. Hubbard to analyze the results and testify at the trial’s penalty phase.
    Dr. Hubbard testified that Michaels suffered from chemical dependency, major
    depressive disorder, latent schizophrenia, a mixed personality disorder, and mild
    brain dysfunction. He explained his basis for these diagnoses and the effects of each
    disorder on Michaels’s functioning. Dr. Hubbard also described Michaels’s
    methamphetamine use and explained that methamphetamine can particularly distort
    reality for individuals with underlying schizophrenic thought disorders. He did not
    43
    believe Michaels was firmly in touch with reality on the night of the murder because
    Michaels had taken a large amount of methamphetamine.
    Chambers stated during habeas proceedings that he would have done more
    preparation had time permitted, including conducting a more thorough investigation
    of Michaels’s family history, interviewing employees from the Department of Social
    Services, obtaining Michaels’s school records, and contacting witnesses who knew
    Michaels during his time in the military. But it is clear from the record that Chambers
    had to decide which theories of mitigation were relatively worth pursuing given the
    restrictions on time: Michaels as protector of Christina, or Michaels as victim of his
    family. Michaels cannot overcome the strong presumption that Chambers’s
    decisions under these circumstances were reasonable.
    Michaels also faults Chambers for failing to present evidence that Michaels
    suffered from long-term brain damage. Dr. Hubbard testified during the penalty
    phase that Michaels suffered from brain damage that likely occurred after high
    school. Dr. Stotland, who conducted testing on Michaels prior to trial, declared
    during habeas proceedings that Michaels suffered from long-term brain damage and
    that, had he been called to testify at trial, he would have presented this fact to the
    jury. Michaels argues that, by inaccurately presenting his brain damage as short-
    term, rather than long-term, Chambers allowed the prosecution to depict Michaels
    44
    as having lived a relatively normal life before his drug use, rather than having turned
    to drugs as a means of coping with his difficult personal history.
    Michaels does not argue that Chambers should have had Dr. Stotland testify
    instead of Dr. Hubbard, nor does he argue that Chambers should have had both
    experts testify. It is unclear how Michaels thinks Chambers should have introduced
    evidence that Michaels suffered from long-term brain damage. If Michaels means to
    argue that Chambers should have had Dr. Hubbard testify and offered separate
    evidence of Michaels’s long-term brain damage, he fails to show that Chambers’s
    decision not to undergo this course of action was deficient. In addition to testifying
    that Michaels had short-term brain damage, Dr. Hubbard testified about Michaels’s
    mental impairments, dependent personality, childhood trauma, and relationship with
    Christina, as well as the impact of these conditions on Michaels’s behavior. Offering
    evidence that directly conflicted with one of Dr. Hubbard’s expert opinions would
    have tended to discredit Dr. Hubbard’s expertise and cast doubt on the valuable
    portions of his testimony. The California Supreme Court therefore reasonably could
    have found that a decision not to introduce such conflicting evidence was not
    deficient performance.
    IV.   CONCLUSION
    For the reasons set forth above, we AFFIRM the district court’s denial of
    habeas relief on all claims.
    45
    FILED
    Michaels v. Davis,                                                        OCT 18 2022
    No. 15-99005                                                          MOLLY C. DWYER, CLERK
    U.S. COURT OF APPEALS
    BERZON, Circuit Judge, dissenting:
    I concur in the per curiam opinion. I dissent from Judge Bea’s opinion for
    himself and Judge Gould (“Majority Opinion”) with respect to the holding that the
    admission of Michaels’s confession and the Popik note did not cumulatively
    prejudice the penalty phase of the trial.1 I would hold the introduction of
    Michaels’s complete improperly Mirandized confession and of the Popik note
    cumulatively prejudiced Michaels at the penalty phase of his trial, and would
    therefore grant the petition as to the penalty phase.
    Although the Majority Opinion correctly considers the issue of cumulative
    prejudice under Brecht without AEDPA deference, it fails to appreciate the
    possible influence of the improperly admitted evidence on the jury’s death
    sentence. The Majority Opinion finds no prejudice, cumulative or otherwise, as to
    the penalty phase. As the Majority Opinion summarizes the record, the improperly
    admitted evidence was infrequently invoked and cumulative of other properly
    admitted evidence. Both characterizations are contrary to the record. Further, the
    1
    Because I would grant Michaels’s petition with respect to the penalty phase for
    the reasons explained in this dissent, I do not express any opinion regarding the
    other issues the Majority Opinion addresses.
    1
    Majority Opinion fails meaningfully to consider the improper evidence in relation
    to the substantial evidence in mitigation.
    The Majority Opinion’s errors are critical because Brecht’s harmless error
    inquiry “is not a matter of pure logic, but of sensitive judgment based on the case
    presented to the jury by the prosecution and the defense.” United States v.
    Montalvo, 
    331 F.3d 1052
    , 1058 (9th Cir. 2003). In contrast to the guilt phase, in
    the penalty phase, “the jury’s role is relatively unconstrained in deciding whether
    to opt for mercy and life rather than the most extreme punishment of death.”
    Walker v. Martel, 
    709 F.3d 925
    , 945 (9th Cir. 2013) (Gould, J., concurring in part).
    Here, the jury was instructed during the penalty phase, “you are free to assign
    whatever moral or sympathetic value you deem appropriate to each and all of the
    various factors you are permitted to consider.” The jury was further instructed:
    “[T]o return a judgment of death, each of you must be persuaded that the
    aggravating circumstances are so substantial in comparison with the mitigating
    circumstances that it warrants death instead of life without parole.”
    Given the broad discretion accorded to the jury “to show mercy and spare
    life based on any consideration in [the defendant’s] background or character,” we
    “must remind ourselves . . . that the possibility of mercy, like the possibility of
    gentle rain, is not predictable with certainty.” Mayfield v. Woodford, 
    270 F.3d 915
    ,
    934, 938 (9th Cir. 2001) (Gould, J., concurring). In this case, the jury deliberated
    2
    for more than three days before returning a death sentence. For the reasons
    explained below, I harbor grave doubt that the harmless error standard is met here.
    I cannot conclude that there is no reasonable probability that a single juror might
    have spared Michaels had the confession and the note been excluded from
    evidence at the penalty phase.
    A.
    When considering the cumulative prejudice of the confession and the Popik
    note, the Majority Opinion omits any meaningful discussion of the evidence
    presented in mitigation. See Majority Op. at 3–11. But, as I shall explain, to assess
    properly the degree of harm the prosecution’s errors caused, we need to include in
    the analysis the weight of the mitigation evidence. I therefore begin by explaining
    why the substantial mitigation evidence presented during the penalty phase
    enhanced the likely prejudicial impact of the improperly admitted evidence at the
    penalty phase.
    Here, the government’s case for the death penalty was up against substantial
    mitigation evidence. Errors favoring the government’s case were therefore more
    likely to be prejudicial. Given the strength of the mitigation evidence, relatively
    modest subtractions from the government’s aggravation evidence, or additions to
    the mitigation evidence via enhancing the credibility of the mitigation witnesses,
    could have swung at least one juror’s conclusion regarding whether “the
    3
    aggravating circumstances are so substantial in comparison with the mitigating
    circumstances that it warrants death instead of life without parole.”
    The record shows that Michaels provided the jury with extensive mitigation
    evidence. For example: Michaels presented evidence that he served in the military.
    A medical expert testified that Michaels suffered from major depressive disorder
    and mixed personality disorder with depressive, dependent, antisocial, and
    borderline features. People v. Michaels (Michaels I), 
    28 Cal. 4th 486
    , 507 (2002).
    The jury further learned that Michaels had mild brain dysfunction, probably from
    use of methamphetamine or from an injury in an auto accident. 
    Id. at 507
    . As the
    Supreme Court has recognized, both kinds of mitigation evidence—military
    service and mental health issues—can be influential with a penalty phase jury. See,
    e.g., Porter v. McCollum, 
    558 U.S. 30
    , 42–44 (2009).
    The defense’s main argument in mitigation was that Michaels understood
    himself as a protector, particularly of victims of sexual assault, and that this
    perception of responsibility for the welfare of such victims influenced his decision
    to commit the murder. In support, the defense presented evidence of traumatic
    experiences in Michaels’s childhood, which, it was argued, both lessened his moral
    culpability and led to his self-image as a protector of abused women.
    Both Michaels’s sister, Cheryl, and his mother, Barbara, testified that his
    father was a violent alcoholic who beat Michaels and his mother. Michaels I, 28
    4
    Cal. 4th at 506. As a child, Michael witnessed his father sexually molest his six-
    year-old sister. After his parents separated, Michaels’s father continued to harass
    the family; the family moved frequently to avoid him. In one instance, Michaels’s
    father tried to run over Michaels and his sister with a car, and then attempted to
    kidnap them. At eleven, Michaels attempted suicide. At thirteen, he found out that
    his mother had been raped. A year later, he learned that his sister also had been
    raped. These events devastated Michaels because, according to his sister and
    mother, he considered it his responsibility to protect them. Id. at 506–07.
    Defense counsel connected this trauma and shame to Michaels’s desire to
    protect his girlfriend, Christina Clemons, from her mother. Christina was the
    defense’s only witness in the guilt phase. She described in detail how her mother
    had physically and sexually abused her from an early age. Id. at 504. Christina
    testified that this abuse had continued, that her mother had assaulted her on two
    overnight visits that occurred shortly before the murder, and that she had told
    Michaels about those incidents. Id.
    In support of the theory that Michaels’s childhood trauma and his
    girlfriend’s situation lessened Michaels’s moral culpability, defense witness Dr.
    Hubbard, a psychiatrist, testified that, in his professional opinion, “the sexual abuse
    of Christina Clemons was the key motivating factor in . . . [the] murder of JoAnn
    Clemons,” not the potential insurance money to be gained. Additionally, Dr.
    5
    Hubbard diagnosed Michaels with major depressive disorder, latent schizophrenia,
    and mixed personality disorder. On the mitigation evidence Michaels presented,
    the jury could have concluded that Michaels’s motive for carrying out the murder
    was ending Clemons’s physical and sexual abuse of Christina.
    Of the mitigating evidence presented to the jury, the Majority Opinion
    acknowledges only this last “potential[ly] mitigating” circumstance—the
    possibility “that Michaels’s motive for the crime was to protect Christina from
    Clemons’s physical and sexual abuse.” Majority Op. at 9. Addressing this
    possibility, the Majority Opinion simply notes, “the jury also heard evidence,”
    including from Christina’s testimony, “that Michaels was not Christina’s protector,
    but another abuser.” Id. This observation has no bearing on the mitigating motive
    for Michaels’s crime. It is entirely consistent that Michaels could have been violent
    toward Christina—at least once, in her telling, in self defense, when she went
    toward Michaels with a knife—and motivated to take action to protect her from
    violence by other people.
    B.
    Strong as the mitigation case was, it was weaker than it would have been had
    the improperly admitted portions of the confession and the Popik note not been
    used to cross-examine mitigation witnesses. Additionally, the improper evidence
    played a prominent role during the government’s presentation of evidence, and in
    6
    its closing argument. The impact on the jury of both uses of the improperly
    admitted evidence was likely significant.
    1.     During Presentation of Evidence
    The Majority Opinion omits entirely the prosecutor’s many references to the
    confession and the note during the presentation of evidence in the penalty phase.
    Early on, the prosecution played the entire unedited confession for the jury; only a
    portion had been played during the guilt phase. The prosecution consistently used
    the confession and the note both to undermine the credibility of witnesses Michaels
    offered in mitigation and to bolster its negative portrayal of Michaels during its
    own presentation of aggravation evidence.2
    (i) Cross-examination during the mitigation case: When the defense called
    Michaels’s sister, Cheryl Goldenberg, to testify on his behalf, the prosecutor used
    the confession on cross-examination to undermine the credibility of her mitigation.
    Q: How do you feel about him joking about raping a woman that he
    murdered?
    A: I don’t believe that he joked about raping anybody.
    Q: You haven’t heard the tape, have you?
    2
    It is error for the prosecution to use confession statements obtained in violation of
    Miranda to impeach the credibility of any defense witness other than the
    defendant. See James v. Illinois, 
    493 U.S. 307
    , 313–14 (1990). Using a confession
    to impeach the defendant’s credibility, moreover, is only permissible when the
    defendant, or a witness relaying his hearsay, has first opened the door by making
    “statements that directly contradict the suppressed” confession. 
    Id. at 314
    ; see also
    United States v. Rosales-Aguilar, 
    818 F.3d 965
    , 970 (9th Cir. 2016). Here,
    Michaels did not testify, so use of the confession on cross-examination was error.
    See James, 
    493 U.S. at 320
    .
    7
    A: No.
    After Goldenberg indicated that she didn’t know whether Michaels committed the
    murder, the prosecutor also asked, “Are you aware that [Michaels] has confessed
    to the murder?” The prosecutor also used the Popik note while cross-examining
    Goldenberg. The prosecutor asked her on cross-examination, “Are you aware your
    brother in that note . . . threatened to hurt Popik during the preliminary
    examination?”
    After Michaels’s mother testified and offered mitigating evidence, the
    prosecutor similarly sought to undermine her credibility on cross-examination by
    invoking the confession:
    Q: Are you aware that he joked all the time about raping the woman that he
    murdered?
    A: No. Not that he joked all the time about raping anybody.
    Q: He told the police that he joked about it and that he always joked about it,
    raping a woman he murdered.
    The prosecutor also mentioned the confession while cross-examining Steven
    Waltzman, although defense counsel’s objection was sustained.
    Q: He confessed to cutting a woman’s throat after waiting outsider of her
    apartment for three hours for her to go to sleep. How do you feel about
    him knowing that he has done those things?
    The prosecutor similarly cross-examined Rev. Flynn Long Jr., Michaels’s
    pastor who testified to offer mitigating evidence:
    Q: And it is your belief, based on all of that experience, that Mr. Michaels is
    not a violent man?
    8
    A: Yes.
    Q: Do you continue to hold that belief knowing that Mr. Michaels confessed
    to waiting outside a woman’s apartment so she could go to sleep so he
    could cut her throat?
    Mr. Chambers: Argumentative.
    The Court: Overruled.
    A: I hadn’t heard that until you just told me.
    Mr. Brodrick: Okay, now that I told you that, is he a violent man or not?
    During a later part of the same cross-examination, the prosecutor referenced
    the confession again:
    Q: Did anyone tell you that Mr. Michaels, when discussing what he had
    done to the police, described cutting this woman’s throat and laughed
    about it?
    A: No.
    The prosecution also asked Dr. Bruce Hubbard, Michaels’s psychiatrist,
    whether his diagnosis of Michaels was “consistent with him laughing on the tape
    when he described the murder?”
    (ii) Government’s aggravation evidence: The trial court had originally
    refused to admit the Popik note during the penalty phase, and permitted the
    prosecution to introduce it only to rebut the evidence put on in mitigation that
    Michaels was not a violent person. As the prosecutor explained to the trial court,
    the defense “put on a host of witnesses to say that the defendant is not violent, they
    put a minister on to say that, even the last witness said he is not going to be violent
    in the future. They put on a psychiatrist to say that he is a follower and not a
    9
    leader. They put on a stepfather to say that he is not a bully. I am entitled to rebut
    each and every one of those pieces of evidence.” The court agreed.
    As a result, the entire focus of the prosecution’s rebuttal testimony—offered
    by Bailiff Steven Lazarus, Court Reporter Elaine Cohen, and Michaels’s former
    attorney Charles Duff—was the Popik note. The prosecutor was able to use the
    note to elicit damaging testimony about Duff’s view as to Michaels’s potential
    dangerousness.
    A: … I just knew that I didn’t want to be the only person that knew the
    contents of that note if something went wrong in the courtroom.
    Q: Why was that?
    A: Well, I would have felt responsible.
    Q: Responsible for what?
    Q: For not telling the proper people, the judge or the bailiff or something
    that there is a possibility that something could happen.
    Q: Possibility of violence?
    A: Correct?
    A: Yeah.
    As this testimony about the Popik note was “among the last words the jurors
    heard before they were sent to deliberate,” the note likely had a heightened
    prejudicial effect. Zapata v. Vasquez, 
    788 F.3d 1106
    , 1122–23 (9th Cir. 2015).
    2.     During Argument
    The majority notes that the confession had “diminished importance” in the
    penalty phase because the prosecutor relied on it “infrequently during its closing
    argument.” Majority Op. at 4. Counting the number of times improperly admitted
    evidence was mentioned in closing is not alone a useful way to measure its likely
    10
    impact. Rather, the question under Brecht is the likely impact of such references on
    the jury verdict, which could be the product of the language used in referring to the
    improper evidence, its placement in the argument sequence, or its inherent
    persuasive value, not simply how often it was mentioned. Brecht v. Abrahamson,
    
    507 U.S. 619
    , 637–38 (1993).
    Here, the prosecutor emphasized the confession as extremely significant,
    stating, “probably the tape is one of the most horrible and aggravated parts of the
    case.” The prosecutor also referenced a specific portion of the confession as
    evidence that Michaels was a particularly dangerous man: “Here he is describing a
    man beating a woman black and blue and his assessment of it is, ‘I will give him
    that much, he went ballistic.’” Confessions have a “profound impact on the jury”
    such that jurors may be unable “to put them out of mind even if told to do so.”
    Arizona v. Fulminante, 
    499 U.S. 279
    , 296 (1991) (quoting Bruton v. United States,
    
    391 U.S. 123
    , 139–40)). When the jury is not so instructed, and the prosecution
    presents and emphasizes the confession during closing argument, a confession is
    especially likely to “ha[ve] a substantial and injurious effect or influence on the
    jury.” Garcia v. Long, 
    808 F.3d 771
    , 783 (9th Cir. 2015).
    Further, the prosecutor in closing argument repeatedly used material that
    came directly from Michaels’s confession, without mentioning the confession
    itself, in describing the aggravating nature of the crime. For example, the
    11
    prosecutor stated, “This is a man who rips a lady’s throat and then laughs about it
    and tells us that it is justice”—an account based on Michaels’s confession. The
    prosecutor went on, “This is . . . a . . . man who dripped blood on JoAnn Clemons
    as she laid beneath him. Cut jug to jug. He feels no remorse. All he can do is laugh
    about it”—again referencing, though not explicitly mentioning, the confession.
    Regarding the Popik note, the Majority Opinion characterizes it as having
    “minimal evidentiary value” and being of “limited use” during the trial. But when
    the prosecutor mentioned the Popik note in closing argument, he said that Duff,
    who testified about the note, was “perhaps my favorite witness,” and that Michaels
    “is a man who is so dangerous that a mere note is a call for immediate action.”
    C.
    Nor was the evidence improperly admitted in the penalty-phase merely
    cumulative of other evidence.
    1.    The Confession
    The Majority Opinion asserts that Michaels’s “confession was redundant
    evidence for each point the prosecutor used it to prove,” Majority Op. at 8, and
    further, that the confession actually “helped support the defense’s own theory” of
    Michaels’s motive, id. at 11. This assessment ignores relevant case law on the
    staying power of a confession in the minds of jurors, see supra p. 11, and also
    misstates the record on the nature of the other evidence before the jury.
    12
    Again, a primary reason why the improperly admitted evidence cannot be
    considered cumulative of other properly admitted evidence is that “[a] confession
    is like no other evidence.” Fulminante, 
    499 U.S. at 296
    . “[T]he defendant’s own
    confession is probably the most probative and damaging evidence that can be
    admitted against him.” 
    Id.
     (internal citation omitted).
    The especially damaging nature of confession evidence is directly relevant
    to the Brecht harmless error standard. That standard, again, focuses on whether the
    error “has substantial and injurious effect or influence in determining the jury’s
    verdict.” Brecht, 
    507 U.S. at 623
     (emphasis added) (quoting Kotteakos v. United
    States, 
    328 U.S. 750
    , 766 (1946)). Kotteakos specified that “the question is . . . not
    were [the jurors] right in their judgment, regardless of the error or its effect upon
    the verdict. It is rather what effect the error had or reasonably may be taken to have
    had upon the jury’s decision.” 
    328 U.S. at 764
    . Justice Stevens’s concurrence in
    Brecht, which provided the majority opinion’s fifth vote, emphasized this language
    in Kotteakos, noting, “[t]he habeas court cannot ask only whether it thinks the
    petitioner would have been convicted even if the constitutional error had not taken
    place. . . . [Kotteakos requires the court to] decide that ‘the error did not influence
    the jury,’ and that ‘the judgment was not substantially swayed by the error.’”
    Brecht, 
    507 U.S. at 642
     (Stevens, J., concurring) (quoting Kotteakos, 
    328 U.S. at
    764–65).
    13
    Further, “[w]here a trial court commits an evidentiary error, the error is not
    necessarily rendered harmless by the fact there was other, cumulative evidence
    properly admitted.” Parle v. Runnels, 
    505 F.3d 922
    , 928 (9th Cir. 2007) (internal
    quotation marks and citation omitted). In a “close case, erroneously admitted
    evidence—even if cumulative of other evidence—can tip the scales against the
    defendant.” 
    Id.
     That concern—that the very cumulation may be what tipped the
    jury—is particularly apt in this case. Here, the improperly admitted evidence
    included a confession to the police, and the jury decision at issue is the death
    penalty, a decision as to which the jury has wide sway to exercise its moral
    convictions, with only the most general legal standards as a guide.
    The Majority Opinion suggests that even though the confession provided
    evidence of the facts underlying the aggravating factors of lying in wait and
    murder for financial gain, the confession was cumulative, or duplicative, of other
    testimony to the same effect, rendering the introduction of the confession harmless
    error. See, e.g., Majority Op. at 2–3, 6, 8-9. But, to borrow the standard from the
    related circumstance in which a juror introduces extraneous evidence into jury
    deliberations, “[t]o be truly considered cumulative, there must be an extremely
    close relationship between the extrinsic evidence and the evidence actually
    admitted.” Eslaminia v. White, 
    136 F.3d 1234
    , 1239 (9th Cir. 1998) (emphasis
    added). For example, Hughes v. Borg, 
    898 F.2d 695
     (9th Cir.1990), deemed an
    14
    unadmitted police report cumulative “because one witness’ testimony was an
    ‘almost word for word verbatim’ recital of the information in the police report.’”
    Eslaminia, 
    136 F.3d at
    1239 (citing Hughes, 898 F.2d at 701).
    Here, there is no such close similarity. Michaels’s confession was
    significantly more detailed and damaging than the assertedly duplicative testimony
    cited.
    i.     The confession was not merely cumulative of other
    evidence ostensibly showing that Michaels lay in wait.
    The Majority Opinion cites a single exchange between the prosecutor and
    Dr. Hubbard during the penalty phase as cumulative of Michaels’s statements in
    his confession showing that he waited for JoAnn Clemons to go to sleep before
    entering her apartment. See Majority Op. at 6-7. This is the entirety of the
    referenced exchange:
    Q: What did he tell you about the murder itself?
    A: The murder itself. I have that he went to the apartment and JoAnn was at
    work. Went back about 5 o’clock. Something about a wall and killed
    time. And he comes back at 12:00 midnight.”
    By contrast, Michaels’s confession, provides extensive detail about his preparation
    for the crime:
    Q: So that’s the only reason you waited, because you wanted to ensure you
    had a ride.
    A: No, we wanted her asleep.
    Q: Why did you want her asleep?
    A: A little less noisy.
    [. . .]
    15
    Q: What happened right after you got inside the door [to the apartment]?
    [. . .]
    A: Pointed the door out. I looked to the bedroom [. . .] Pointed it. Put certain
    things down on the couch that would make noise that were on my person;
    a wallet with a chain on it . . . all kinds of other shit. Went to the
    bedroom, and everything fucking broke loose.
    [. . .]
    Q: You didn’t turn the light on or anything?
    A: Uh uh. The whole point was not to wake her.
    This portion of Michaels’s confession, in the prosecutor’s words (from the guilt
    phase), “tell[s] us that the very time of the murder, he wanted the ambush to be in
    effect. He wanted to attack that woman even as she slept. . . . The whole point of
    this elaborate and evil and treacherous murder was to strike at a time when JoAnn
    Clemons couldn’t even resist.” Comparing these two pieces of evidence side by
    side reveals that Michaels’s confession is far more than a mere duplication of Dr.
    Hubbard’s sparse testimony that Michaels “[w]ent back about 5 o’clock.
    Something about a wall and killed time.”
    ii.    The confession was not merely cumulative of other
    evidence ostensibly showing Michaels had a financial
    motive.
    The Majority Opinion cites multiple exchanges regarding Michaels’s
    financial motive as cumulative of Michaels’s confession. The jury had already
    found a financial motive as a special circumstance during the guilt phase. But
    during the penalty phase the jury had the opportunity to consider the specific facts
    underlying that special circumstance again, and, critically, to weigh those facts
    16
    against the key mitigating evidence presented by the defense—that there was
    another motive as well, protecting Christina from her abusive mother.
    First, the majority mischaracterizes Dr. Hubbard’s testimony, stating that his
    testimony “show[ed] it was the money, and not protecting Christina, that was his
    true motivation.” Majority Op. at 9. But Dr. Hubbard did not endorse this theory,
    as shown by this exchange on cross-examination:
    Q: … Did you consider the statement by Christina Clemons that ‘I suggested
    to Kurt Michaels that my mother might have life insurance as to give him
    motivation to kill her. She had told me once that since I was in a
    treatment, that I was her beneficiary again and who to contact at Pepper
    Tree Nursery to help me.’ Did you consider that statement?
    A: I did.
    Q: So money was part of the dynamics in the relationship of Christina
    Clemons and Mr. Michaels regarding the murder, was it not?
    A: I don’t see that as part of the dynamics, I see that as another tool of
    manipulation that Christina Clemons was using to get Mr. Michaels to do
    the murder.
    What followed was a lengthy exchange in which Dr. Hubbard emphasized, “[i]n
    my opinion the intensity of the psychological issues involved far outweighs that of
    a monetary factor in this case.” Dr. Hubbard also stated that while insurance “may
    be a contributing factor,” his assessment of Michaels’s “becoming motivated to do
    the murder relates primarily to [Michaels’s] need to protect and shelter Christina.”
    Dr. Hubbard’s testimony thus provided context for the financial motive the
    jury had earlier found, reaffirming the defense’s mitigation theory without
    disputing that there was some financial motive. Michaels’s financial motive,
    17
    according to Dr. Hubbard, was at most a “contributing factor,” subordinate to
    Michaels’s desire to help and protect Christina. This piece of evidence, considered
    as a whole, was not cumulative of Michaels’s damaging confession. It was
    mitigating.
    The Majority Opinion also points to the fact that the jury heard that
    “Michaels wrote a letter before the murder that said he would do ‘whatever his
    morals allowed’ to provide financial backing for himself and Christina.” Majority
    Op. at 9. The Opinion, however, points only to the prosecutor’s question on this
    topic. Dr. Hubbard responded that he had “not read any letter like that.”
    Q: Do you know that Mr. Michaels had stated in a letter to a gentleman by
    the name of ‘Mr. F’ that he would do whatever his morals allowed him to
    provide a financial backing for himself and Christina Clemons?
    A: I did not read any letter like that.
    A prosecutor’s question is not, of course, evidence, so it cannot be considered
    cumulative of Michaels’s confession during the penalty phase.
    The Majority Opinion finally cites the fact that another witness testified
    during the guilt phase “that Michaels made a statement about knocking off
    Christina’s old lady, and that Christina replied, ‘then we can get the money.’”
    Majority Op. at 10 (quoting Michaels I, 
    28 Cal. 4th at 519
    ). This testimony, which
    does go to the financial gain issue, is the only piece of percipient witness evidence
    overlapping with Michaels’s confession on the financial motive. But the force of
    that testimony was dubious; standing alone, it may well have been rejected by the
    18
    jury. The witness admitted the statements she relayed were from “overhear[ing]”
    the “tail end of the conversation” between Michaels and Christina, and she said she
    “didn’t believe the conversation.”
    By contrast, the portion of Michaels’s confession about financial motivation
    was detailed. His confession included the exact dollar number—$100,000—he told
    Popik he would give him to induce him to participate in the crime: “I told him [the
    insurance policy]’d help give Chris[tina] and I get a start.” Michaels admitted
    money was a “sideline benefit” of the crime. And when the detective offered,
    “Because if [JoAnn Clemons] had insurance, that would provide Christina with
    some money to . . . ,” Michaels volunteered, “To do good.” On the financial gain
    issue, Michaels’s confession was more detailed than any other evidence properly
    admitted during the penalty phase.
    2.     The Popik Note
    The Majority Opinion spends very little time on the impact of the Popik note
    on the jury, but suggests the note should also be considered cumulative and so
    lacking in impact. Majority Op. at 11-12. I must disagree.
    The note was the prosecution’s only evidence on rebuttal, and the last
    evidence presented during the penalty phase. “The presentation of improper
    material at the end of trial magnifies its prejudicial effect because it is freshest in
    the mind of the jury when it retires to deliberate.” Zapata, 
    788 F.3d at
    1122–23
    19
    (internal brackets, quotation, and citation omitted). The Popik note, moreover, was
    admitted only to counter the mitigation evidence that Michaels was not normally a
    violent person, which was important evidence during the penalty phase.
    With regard to the note, the Majority Opinion asserts that the jury “heard
    extensive evidence of Michaels’s potential for future dangerousness, including
    evidence that he had a ‘hit list’ of future murders he wanted to commit.” Majority
    Op. at 12. But the prosecution explicitly did not introduce the so-called “hit list” to
    establish Michaels’s “potential for future dangerousness,” nor was it permitted to
    do so. The district court explained that if the prosecution had sought to introduce
    the list as evidence that “[Michaels] [wa]s going to actually kill people” that
    purpose “would cause [the court] to exclude it.” The list was admitted only to show
    Michaels’s “motive to establish a reputation as a contract killer,” not that he
    intended to kill anyone. People v. Michaels, 
    28 Cal. 4th 486
    , 534 (2002) (emphasis
    added). The list is therefore not cumulative of the Popik note as evidence of
    Michaels’s actual propensity for violence.
    In sum, the primary reasons why the improperly admitted evidence cannot
    be considered cumulative of other properly admitted evidence are first, “[a]
    confession is like no other evidence,” Fulminante, 
    499 U.S. at 296
    , and second, the
    Popik note, used to highlight the argument that Michaels was extremely dangerous,
    was the only subject of the prosecution’s rebuttal evidence, the last testimony the
    20
    jury heard. See Zapata, 
    788 F.3d at
    1122–23. Further, neither the confession nor
    the note was simply redundant of other testimony; the confession was considerably
    more detailed, and the note went to current, actual propensity for violence, not past
    violence or reputational puffery.
    D.     Conclusion
    Given the substantial evidence in mitigation and the fact that the jury
    deliberated on the penalty for more than three days, it is my firm view that there is
    a real probability a single juror might have spared Michaels’s life were it not that:
    the prosecutor played Michaels’s entire unconstitutionally obtained confession
    about the circumstances of the crime at the start of the penalty phase; the
    prosecution described the confession in closing as “one of the most horrible and
    aggravated parts of the case”; the prosecution devoted its rebuttal evidence, the last
    evidence heard by the jury, to the Popik note; the prosecution described, in closing,
    Michaels’s former attorney who testified about the note, as “probably my favorite
    witness”; and the prosecution used both the confession and the note consistently to
    undermine the evidence Michaels presented in mitigation.
    The prosecution introduced evidence of prior violent acts, but Michaels had
    never been convicted of a felony. Defense counsel argued in closing, “Michaels is
    not the worst of the worst” and did not deserve the “ultimate penalty.” In my view,
    at least one juror may well have so concluded but for the improperly introduced
    21
    evidence used at the trial. We have found prejudice resulting from constitutional
    errors in cases with far worse aggravating factors. 3 As, I am convinced, the
    prejudicial impact at the penalty phase of the improperly Mirandized confession
    statements and the Popik note, combined, more than meets the Brecht standard, I
    would reverse the death penalty verdict.
    3
    See, e.g., Wharton v. Chappell, 
    765 F.3d 953
    , 959, 960–61, 978–79 (defendant
    bludgeoned his girlfriend with a hammer, stuffed her in a barrel in his kitchen for
    days, and had several prior felony convictions, including the murder of a professor
    and the forcible rape of a sixty-one-year-old woman at knifepoint); Hovey v. Ayers,
    
    458 F.3d 892
    , 898, 930 (9th Cir. 2006) (defendant kidnapped and killed an eight-
    year old girl and also had kidnapped another young girl on a separate occasion);
    Douglas v. Woodford, 
    316 F.3d 1079
    , 1083–84, 1091 (defendant sexually abused
    and then murdered two teenage girls and had a prior history of sexually abusing
    young girls). Douglas, Wharton, and Hovey all found that the defendant
    established prejudice resulting from constitutionally ineffective assistance of
    counsel under the standard announced in Strickland v. Washington, 
    466 U.S. 668
    (1984). The Supreme Court has suggested that the Strickland prejudice standard
    imposes a higher burden on the defendant than the Brecht harmlessness standard.
    See Kyles v. Whitley, 
    514 U.S. 419
    , 436 (1995); United States v. Dominguez
    Benitez, 
    542 U.S. 74
    , 86 (2004) (Scalia, J., concurring in the judgment).
    22