Parle v. Runnels ( 2007 )


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  •                 FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    TIMOTHY CHARLES PARLE,                   No. 06-16780
    Petitioner-Appellee,
    v.                           D.C. No.
    CV-01-03487-WHA
    DAVID L. RUNNELS, Warden,
    OPINION
    Respondent-Appellant.
    
    Appeal from the United States District Court
    for the Northern District of California
    William H. Alsup, District Judge, Presiding
    Argued and Submitted
    June 13, 2007—San Francisco, California
    Filed October 10, 2007
    Before: Michael Daly Hawkins, A. Wallace Tashima, and
    Carlos T. Bea, Circuit Judges.
    Opinion by Judge Hawkins
    13677
    PARLE v. RUNNELS                 13679
    COUNSEL
    Bruce Ortega, Deputy Attorney General for the State of Cali-
    fornia, San Francisco, California, for the respondent-
    appellant.
    13680                   PARLE v. RUNNELS
    Martin N. Buchanan, Niddrie, Fish, & Buchanan LLP, San
    Diego, California, for the petitioner-appellee.
    OPINION
    HAWKINS, Circuit Judge:
    Domestic violence is a serious problem in America. When
    love turns to hate, grave injury—even death—can result.
    When that violence spins out of control, considerable prob-
    lems confront the criminal justice system. The heat of the
    moment and the history of the relationship can make it quite
    difficult to assess responsibility. Sometimes it is clear who the
    aggressor is or has been; sometimes it is not so clear. The trial
    at issue here required a California jury to make just such a dif-
    ficult determination. Because we conclude, as did the district
    court, that multiple errors in the admission and exclusion of
    evidence accumulated to deprive Timothy Charles Parle
    (“Parle”) of a constitutionally fair trial, and that the one-sided
    prejudice caused by these errors made the state court’s con-
    trary conclusion objectively unreasonable, we affirm the grant
    of habeas relief.
    FACTS AND PROCEDURAL HISTORY
    Because the relevant facts are recited in this court’s prior
    opinion, Parle v. Runnels, 
    387 F.3d 1030
    , 1033-34 (9th Cir.
    2004) (Parle I), and the district court’s most recent order,
    Parle v. Runnels, 
    448 F. Supp. 2d 1158
    , 1160-61 (N.D. Cal.
    2006) (Parle III), and are largely uncontested by the parties,
    we offer only a brief synopsis.
    Parle killed his wife, Mary, on December 17, 1993, by stab-
    bing her in the back during a domestic dispute. By all
    accounts, Parle and Mary had “a stormy relationship,” punctu-
    ated by verbal and physical abuse by both parties. Parle I, 387
    PARLE v. RUNNELS                   13681
    F.3d at 1033. At trial, Parle conceded that he unlawfully
    killed his wife, contesting only his state of mind at the time
    of the killing. Although Parle contended that his state of mind
    was such that he could be guilty of no more than second-
    degree murder or voluntary manslaughter, a jury convicted
    him of first-degree murder. See Parle III, 
    448 F. Supp. 2d at 1161
    .
    On direct review, the California Court of Appeal identified
    numerous, serious errors in the trial proceedings. Specifically,
    the court of appeal held that the trial court:
    •   Violated Parle’s psychotherapist-patient privilege
    by erroneously holding that the privilege had
    been waived and requiring Parle’s psychiatrist to
    give damaging testimony against Parle;
    •   Improperly excluded rebuttal testimony from a
    defense expert about the effects of a manic epi-
    sode due to severe bipolar disorder, relevant to
    whether Parle had the mental state required for a
    first-degree murder conviction;
    •   Improperly excluded evidence of Mary’s propen-
    sity for violence, including her threats to Parle in
    the weeks leading up to his crime;
    •   Improperly excluded testimony of Parle’s father
    relating to Parle’s appearance and demeanor
    immediately before and after the crime; and
    •   Improperly admitted impermissible character evi-
    dence of Parle’s threats to a police officer five
    years prior to his crime.
    Despite these errors, the California Court of Appeal upheld
    Parle’s conviction, concluding that the various errors—both
    individually and collectively—were harmless. The court of
    13682                      PARLE v. RUNNELS
    appeal reasoned that the erroneously excluded (or included)
    evidence was “essentially cumulative” of other properly
    admitted evidence, and therefore that it was not reasonably
    probable that the jury would have returned a different verdict
    but for the errors.1 People v. Parle, No. H017348, slip op. at
    56 (Cal. Ct. App. 2000). As such, the court held that the errors
    did not result in a “serious flaw” in Parle’s trial. Accordingly,
    “the determinations by the judge and jury were reliable” and
    Parle’s trial “fundamentally fair.” Id. at 57 (internal quota-
    tions omitted).
    Parle thereafter sought federal habeas relief. Following
    extensive briefing, the district court subsequently granted
    relief, concluding that: (1) “the California Court of Appeal
    clearly erred in finding that admission of the victim’s diary
    did not violate the Confrontation Clause” and (2) “the cumu-
    lative effect of this and several other evidentiary errors
    deprived petitioner of his due process right to a fair trial.”
    This court reversed on appeal, concluding that no Confronta-
    tion Clause violation occurred, and remanded for further con-
    sideration of Parle’s cumulative error/due process claim.
    Parle I, 
    387 F.3d at 1046
    .
    On remand, the district court again granted habeas relief.
    The district court concluded: (1) the California Court of
    Appeal engaged in an issue-by-issue analysis, rather than a
    cumulative effect analysis; and (2) to the extent the state court
    actually performed a cumulative error analysis, it applied an
    incorrect standard—whether the errors resulted in a “serious
    flaw” in defendant’s trial—rather than a “substantial and inju-
    rious effect” standard. This court again reversed, concluding
    that “[the state] court, however imperfectly, conducted cumu-
    lative error review of the trial” and remanding “for the district
    court to determine whether the decision was an objectively
    1
    With regard to the constitutional error resulting from Parle’s psychia-
    trist’s testimony, the court concluded it was “harmless beyond a reason-
    able doubt.” See Chapman v. California, 
    386 U.S. 18
    , 24 (1967).
    PARLE v. RUNNELS                           13683
    unreasonable application of [clearly established Supreme
    Court law]” under AEDPA.2 Parle v. Runnels, No. 05-16610,
    
    177 Fed. Appx. 759
    , 759 (9th Cir. Apr. 27, 2006) (Parle II).
    Following this second remand, the district court once again
    granted habeas relief, concluding that “[t]he erroneous evi-
    dentiary rulings . . . infected the trial with such unfairness that
    it rose to the level of a due-process violation.” Parle III, 
    448 F. Supp. 2d at 1171-72
    . Because “the [cumulative] impact of
    these errors is devastating to one’s confidence in the reliabil-
    ity of the verdict,” the district court held that the California
    Court of Appeal’s “decision to the contrary was an unreason-
    able application of [Chambers v. Mississippi, 
    410 U.S. 284
    (1973), Krulewitch v. United States, 
    336 U.S. 440
     (1949), and
    Hawkins v. United States, 
    358 U.S. 74
     (1954)].” Parle III, 
    448 F. Supp. 2d at 1172
    . The State timely appealed.3
    JURISDICTION AND STANDARD OF REVIEW
    We have jurisdiction under 
    28 U.S.C. §§ 1291
     and
    2253(c)(3) and “review de novo a district court’s order grant-
    ing a writ of habeas corpus.” Parle I, 
    387 F.3d at 1034
    .
    Under AEDPA, habeas relief is available only where a state
    court’s rulings “resulted in a decision that was contrary to, or
    involved an unreasonable application of, clearly established
    federal law, as determined by the [United States] Supreme
    Court,” 
    28 U.S.C. § 2254
    (d)(1), or were based on “an unrea-
    sonable determination of the facts,” 
    id.
     § 2254(d)(2). Where,
    as here, the state supreme court denies review of a prisoner’s
    habeas petition without comment, we “look to the last rea-
    soned state-court decision”: in this case, that of the California
    2
    The Antiterrorism and Effective Death Penalty Act of 1996
    (“AEDPA”), 
    28 U.S.C. §§ 2241
     et seq.
    3
    The district court stayed the effectiveness of its order until ninety days
    after all appellate proceedings become final. 
    Id.
    13684                      PARLE v. RUNNELS
    Court of Appeal. Van Lynn v. Farmon, 
    347 F.3d 735
    , 738 (9th
    Cir. 2003).
    A state court’s decision involves an unreasonable applica-
    tion of clearly established federal law “if ‘the state court iden-
    tifies the correct governing legal principle[ ] from [Supreme
    Court] decisions, but unreasonably applies that principle to
    the facts of the prisoner’s case.’ ”4 Ramirez v. Castro, 
    365 F.3d 755
    ,762 (9th Cir. 2004) (quoting Williams v. Taylor, 
    529 U.S. 362
    , 413 (2000)). The state court’s application must be
    more than erroneous, it must be “objectively unreasonable.”
    Lockyer v. Andrade, 
    538 U.S. 63
    , 75 (2003). Finally, if a state
    court’s decision was objectively unreasonable, we may grant
    habeas relief only if the error had a “substantial or injurious
    effect” on the verdict. Brecht v. Abrahamson, 
    507 U.S. 619
    ,
    637-38 (1993); Parle I, 
    387 F.3d at 1035
    .
    DISCUSSION
    I.       Clearly Established Law
    A)       Cumulative Error and Due Process
    [1] The Supreme Court has clearly established that the
    combined effect of multiple trial court errors violates due pro-
    cess where it renders the resulting criminal trial fundamen-
    tally unfair. Chambers, 
    410 U.S. at 298, 302-03
     (combined
    effect of individual errors “denied [Chambers] a trial in
    accord with traditional and fundamental standards of due pro-
    cess” and “deprived Chambers of a fair trial”).5 The cumula-
    4
    Our prior holding that the state court performed cumulative error
    review, Parle II, 177 Fed. Appx. at 759, operates as law of the case estab-
    lishing that the state court’s decision was not “contrary to” clearly estab-
    lished Supreme Court law and prevents reconsideration of this issue, see
    Murdoch v. Castro, 
    489 F.3d 1063
    , 1067-68 (9th Cir. 2007).
    5
    See also Montana v. Egelhoff, 
    518 U.S. 37
    , 53 (1996) (stating that
    Chambers held that “erroneous evidentiary rulings can, in combination,
    PARLE v. RUNNELS                          13685
    tive effect of multiple errors can violate due process even
    where no single error rises to the level of a constitutional vio-
    lation or would independently warrant reversal. Chambers,
    
    410 U.S. at
    290 n.3.6
    Under traditional due process principles, cumulative error
    warrants habeas relief only where the errors have “so infected
    the trial with unfairness as to make the resulting conviction a
    denial of due process.” Donnelly v. DeChristoforo, 
    416 U.S. 637
    , 643 (1974). Such “infection” occurs where the combined
    effect of the errors had a “substantial and injurious effect or
    influence on the jury’s verdict.” Brecht, 
    507 U.S. at 637
    (internal quotations omitted); see also Thomas, 273 F.3d at
    1179-81 (noting similarity between Donnelly and Brecht stan-
    dards and concluding that “a Donnelly violation necessarily
    meets the requirements of Brecht”). In simpler terms, where
    the combined effect of individually harmless errors renders a
    criminal defense “far less persuasive than it might [otherwise]
    rise to the level of a due process violation”); Taylor v. Kentucky, 
    436 U.S. 478
    , 487 n.15 (1978) (“[T]he cumulative effect of the potentially damag-
    ing circumstances of this case violated the due process guarantee of funda-
    mental fairness . . . .”).
    Although we have never expressly stated that Chambers clearly estab-
    lishes the cumulative error doctrine, we have long recognized the due pro-
    cess principles underlying Chambers. See, e.g., Thomas v. Hubbard, 
    273 F.3d 1164
    , 1179-80 (9th Cir. 2002) (analyzing cumulative error in
    AEDPA habeas petition); Whelchel v. Washington, 
    232 F.3d 1197
    , 1212
    (9th Cir. 2000) (noting that cumulative error doctrine applies on pre-
    AEDPA habeas review); United States v. Frederick, 
    78 F.3d 1370
    , 1381
    (9th Cir. 1996) (recognizing the importance of considering “the cumula-
    tive effect of multiple errors”).
    6
    See also Thomas, 
    273 F.3d at 1179
     (“In analyzing prejudice in a case
    in which it is questionable whether any ‘single trial error examined in iso-
    lation is sufficiently prejudicial to warrant reversal,’ this court has recog-
    nized the importance of considering ‘the cumulative effect of multiple
    errors’ and not simply conducting ‘a balkanized, issue-by-issue harmless
    error review.’ ”) (quoting Frederick, 
    78 F.3d at 1381
    ).
    13686                      PARLE v. RUNNELS
    have been,” the resulting conviction violates due process. See
    Chambers, 
    410 U.S. at 294, 302-03
    .
    B)    Harmless Error and Cumulative Evidence
    In evaluating a due process challenge based on the cumula-
    tive effect of multiple trial errors, a reviewing court must
    determine the relative harm caused by the errors. If the evi-
    dence of guilt is otherwise overwhelming, the errors are con-
    sidered “harmless” and the conviction will generally be
    affirmed. See Frederick, 
    78 F.3d at
    1381 (citing United States
    v. Berry, 
    627 F.2d 193
    , 201 (9th Cir. 1980)). The “logical cor-
    ollary” of this harmless error doctrine is that trial errors are
    more likely to be prejudicial to a defendant—i.e., not
    harmless—when the government’s case on a critical element
    is weak. 
    Id.
     Accordingly, in determining whether the com-
    bined effect of multiple errors rendered a criminal defense
    “far less persuasive” and had a “substantial and injurious
    effect or influence” on the jury’s verdict, the overall strength
    of the prosecution’s case must be considered because “a ver-
    dict or conclusion only weakly supported by the record is
    more likely to have been affected by errors than one with
    overwhelming record support.” Strickland v. Washington, 
    466 U.S. 668
    , 696 (1984).7
    Where a trial court commits an evidentiary error, the error
    is not necessarily rendered harmless by the fact there was
    other, cumulative evidence properly admitted. See
    Krulewitch, 
    336 U.S. at 444-45
     (holding that, in a close case,
    erroneously admitted evidence—even if cumulative of other
    evidence—can “tip[ ] the scales” against the defendant); Haw-
    7
    See also Glasser v. United States, 
    315 U.S. 60
    , 67 (1942) (“[Where]
    the scales of justice may be delicately poised between guilt and innocence
    . . . error, which under some circumstances would not be ground for rever-
    sal, cannot be brushed aside as immaterial since there is a real chance that
    it might have provided the slight impetus which swung the scales toward
    guilt.”).
    PARLE v. RUNNELS                         13687
    kins, 358 U.S. at 80 (concluding that erroneously admitted
    evidence, “though in part cumulative,” may have “tip[ped] the
    scales against petitioner on the close and vital issue of his
    [state of mind]”).
    C)    Summary
    [2] In sum, the Supreme Court has clearly established that
    the combined effect of multiple trial errors may give rise to
    a due process violation if it renders a trial fundamentally
    unfair, even where each error considered individually would
    not require reversal. Donnelly, 
    416 U.S. at 643
    ; Chambers,
    
    410 U.S. at
    290 n.3, 298, 302-03. Furthermore, the cumulative
    nature of the challenged evidence does not necessarily render
    its inclusion (or exclusion) harmless. Krulewitch, 
    336 U.S. at 444-45
    . Rather, the fundamental question in determining
    whether the combined effect of trial errors violated a defen-
    dant’s due process rights is whether the errors rendered the
    criminal defense “far less persuasive,” Chambers, 
    410 U.S. at 294
    , and thereby had a “substantial and injurious effect or
    influence” on the jury’s verdict, Brecht, 
    507 U.S. at 637
    (internal quotations omitted).
    II.   AEDPA Review
    A)    Chambers v. Mississippi
    Because Chambers clearly established that the cumulative
    effect of trial errors can violate due process, it provides the
    starting point for our analysis.8 In light of the district court’s
    thorough and accurate account of the Chambers decision, see
    Parle III, 
    448 F. Supp. 2d at 1162-63
    , we recount its facts
    only briefly.
    8
    The State’s argument that Parle’s cumulative error claim is not cogni-
    zable on habeas review because it asks the court to recognize a new con-
    stitutional rule, see Teague v. Lane, 
    489 U.S. 288
     (1989), lacks merit. As
    noted above, Chambers and its progeny clearly established the cumulative
    error doctrine decades ago.
    13688                   PARLE v. RUNNELS
    Leon Chambers (“Chambers”) was charged with murder
    for allegedly shooting a police officer. Prior to Chambers’s
    trial, Gable McDonald (“McDonald”) came forward and pro-
    vided a sworn confession that he was the actual shooter.
    Chambers, 
    410 U.S. at 287
    . However, at a subsequent hear-
    ing, McDonald recanted and was released from custody. 
    Id. at 288
    . Nonetheless, Chambers’s primary defense at trial was
    that McDonald was the real shooter. 
    Id. at 288-89
    . Chambers
    called McDonald to the stand and had his out-of-court confes-
    sion read to the jury. On cross-examination, however,
    McDonald testified that he had repudiated his confession,
    explaining that he falsely confessed only after being assured
    that he would not go to jail and would share in proceeds from
    a tort suit Chambers would bring against the town. 
    Id.
     at 288-
    89, 291. Applying state rules of evidence, the trial court pre-
    vented Chambers from treating McDonald as an adverse wit-
    ness in order to cross-examine him about his repudiated
    confession because McDonald’s testimony had not specifi-
    cally implicated Chambers. 
    Id. at 291-92
    .
    The trial court also excluded as inadmissible hearsay the
    testimony of three witnesses that McDonald had confessed to
    them individually that he was the shooter. 
    Id. at 292-93
    .
    Although Chambers was able to introduce limited testimony
    impeaching McDonald’s credibility and supporting his theory
    of the case, as a result of the trial court’s rulings, he was pre-
    vented from presenting critical evidence to support his claim
    that McDonald was the actual shooter, and his primary
    defense was therefore “far less persuasive than it might [oth-
    erwise] have been.” 
    Id. at 294
    .
    Chambers appealed the conviction to the Mississippi
    Supreme Court, which affirmed. The Supreme Court granted
    certiorari, and held that the combined effect of the trial court’s
    rulings preventing Chambers from both cross-examining
    McDonald and introducing witness testimony of McDonald’s
    previous confessions “denied [Chambers] a trial in accord
    with traditional and fundamental standards of due process.”
    PARLE v. RUNNELS                         13689
    
    Id. at 302
    . Notably, the Supreme Court so held even though
    the evidence excluded as a result of the trial court’s errors was
    at least in part cumulative of other properly admitted evidence9
    and the state appellate court had identified no errors of state
    law.
    B)    Parle’s Case
    In light of the due process principles established in Cham-
    bers and the starkly one-sided impact of the errors in Parle’s
    case, the California Court of Appeal’s conclusion that the
    cumulative effect of the multiple evidentiary errors did not
    violate Parle’s due process rights was an objectively unrea-
    sonable application of clearly established due process law as
    determined by the Supreme Court.10 The district court’s grant
    of habeas relief must therefore be affirmed.
    A unique and critical thread runs through the trial errors in
    this case: all of the improperly excluded evidence in Parle’s
    9
    For example: (1) McDonald’s sworn, written confession had been read
    to the jury, 
    410 U.S. at 291
    ; (2) a witness testified that he “saw McDonald
    shoot the officer,” 
    id. at 289
    ; (3) a second witness testified that “he saw
    McDonald immediately after the shooting with a pistol in his hand,” id.;
    (4) another witness contradicted McDonald’s account that he had been
    having beers in a cafe at the time of the shooting, 
    id. at 292
    ; and (5) a gun
    dealer testified that McDonald owned a .22-caliber—the same caliber as
    the shooter’s—at the time of the crime, 
    id.
     at 294-95 & n.5.
    10
    The district court held that the California Court of Appeal’s conclu-
    sion that the errors were collectively harmless because the evidence at
    issue was “essentially cumulative” of other properly admitted evidence
    was also an unreasonable application of Supreme Court precedent estab-
    lishing that the cumulative nature of evidence does not necessarily render
    its erroneous inclusion (or exclusion) harmless. See Parle III, 448 F. Supp.
    2d at1167-68; see also Krulewitch, 
    336 U.S. at 444-45
    ; Hawkins, 358 U.S.
    at 80. However, because we conclude that the cumulative effect of the
    multiple trial errors violated Parle’s due process rights and the California
    Court of Appeal’s conclusion to the contrary was an objectively unreason-
    able application of clearly established Supreme Court law, we need not—
    and do not—examine this additional basis for habeas relief.
    13690                       PARLE v. RUNNELS
    case—i.e., expert testimony about the effects of a bipolar
    manic episode on one’s state of mind, the victim’s previous
    threats and history of violence, and Parle’s father’s testimony
    about Parle’s appearance and demeanor immediately before
    and after the crime—supported Parle’s defense that he lacked
    the requisite state of mind for first-degree murder; at the same
    time, all of the erroneously admitted evidence—i.e., Parle’s
    psychiatrist’s testimony in violation of privilege about Parle’s
    minor bipolar disorder and relative stability in treatment, and
    evidence of Parle’s violent threats to a police officer—
    undermined Parle’s defense and credibility and bolstered the
    State’s case. The combined effect of these errors, like those
    in Chambers, rendered Parle’s defense “far less persuasive
    than it might have been,” id. at 294, and therefore had a “sub-
    stantial and injurious effect or influence on the jury’s verdict,”
    Brecht, 
    507 U.S. at 637
    , violating Parle’s due process rights.
    And, given the plainly one-sided prejudice resulting from
    these errors and their direct relevance to the only contested
    issue before the jury, the state court’s conclusion to the con-
    trary was objectively unreasonable.
    1)    Erroneous Admission and Exclusion of Medical
    Testimony
    [3] The trial court erroneously admitted damaging testi-
    mony from Parle’s psychiatrist, Dr. Antoinette Acenas, in vio-
    lation of Parle’s constitutional right to privacy,11 while
    simultaneously preventing testimony from Dr. Jay Jackman—
    11
    The right to privacy of a patient’s communications with his psycho-
    therapist is grounded in the federal and state constitutions. Caesar v.
    Mountanos, 
    542 F.2d 1064
    , 1067-68 (9th Cir. 1976) (recognizing a right
    to privacy in psychotherapist-patient relationship arising out of the Four-
    teenth Amendment to the U.S. Constitution); San Diego Trolley, Inc. v.
    Superior Court, 
    105 Cal. Rptr. 2d 475
    , 481 (Cal. Ct. App. 2001) (recog-
    nizing right to privacy protected by California Constitution article I, § 1).
    This right to privacy exists in addition to the statutory protection of confi-
    dential communications between patient and psychotherapist. 
    Cal. Evid. Code § 1014
    .
    PARLE v. RUNNELS                    13691
    Parle’s expert medical witness—about the effects of a bipolar
    manic episode “relevant to the question whether [Parle] actu-
    ally had the mental state required for a first degree murder
    conviction.” Parle, No. H017348, slip op. at 31. The cumula-
    tive effect of these errors alone violated Parle’s due process
    rights and rendered his trial unfair.
    a)   Dr. Acenas
    In her testimony, Dr. Acenas was compelled to reveal
    Parle’s private, confidential statements that Mary made him
    “ready to explode” and that he had thought of hurting her (and
    others), but noted that Parle had never made any specific
    complaints about Mary’s violent behavior towards him. Dr.
    Acenas further testified that Parle suffered from the more
    minor Type II bipolar disorder, characterized by shorter and
    less severe mood swings. Finally, she testified that Parle had
    not exhibited any manic symptoms around the time of (or in
    the 18 months prior to) his crime and generally appeared to
    be doing well on his medication. The State seized upon this
    testimony in its closing statement, arguing that it bolstered the
    State’s theory that Parle had long held violent thoughts about
    his wife and possessed the requisite state of mind at the time
    of the crime to be convicted of first-degree murder. Despite
    the apparent prejudice to Parle from this error, the California
    Court of Appeal nonetheless held that the error was “harmless
    beyond a reasonable doubt” because the unconstitutionally
    admitted testimony “was merely cumulative of other evi-
    dence” insofar as “[t]he jury already knew Parle was seeing
    a psychiatrist . . . . [and] that he and Mary had been having
    marital problems.” People v. Parle, No. H017348, slip op. at
    32.
    However, as the district court concluded, the other evidence
    of Parle’s medical and marital history “was a far cry from the
    force of the medical testimony compelled in violation of the
    privilege.” Parle III, 
    448 F. Supp. 2d at 1165
    . Dr. Acenas’s
    testimony was cumulative only in the most general sense that
    13692                  PARLE v. RUNNELS
    it also discussed Parle’s marriage and general psychological
    health. The specificity of the testimony, however, was mir-
    rored nowhere else in the record. Moreover, there was no
    other specific evidence of Parle’s violent thoughts toward
    Mary. Although the record contains evidence of Parle’s vio-
    lent tendencies in general, as well as his stormy marriage with
    Mary in particular, Dr. Acenas provided the only medical tes-
    timony laying the foundation for the State’s theory that
    Mary’s murder was premeditated. Furthermore, even if the
    evidence were cumulative, this fact does not render its errone-
    ous admission necessarily harmless. See Krulewitch, 
    336 U.S. at 444-45
    .
    b)    Dr. Jackman
    The prejudice caused by Dr. Acenas’s erroneously admitted
    testimony was exacerbated by the erroneous exclusion of tes-
    timony from Dr. Jackman—Parle’s expert psychiatric witness.
    Although Dr. Jackman was permitted to testify that Parle suf-
    fered from the more severe Type I bipolar disorder and
    appeared to be in the midst of a manic episode on the night
    of his crime, he was erroneously prevented from testifying
    about the effects of a manic episode on one’s general state of
    mind and ability to premeditate. Specifically, the trial court
    erroneously struck Dr. Jackman’s statements that “bipolar dis-
    order is characterized by impulsiveness and poor judgment,
    and that a person does not stop to consider the consequences
    or alternatives during a manic episode.” Parle III, 
    448 F. Supp. 2d at 1165
    . As the California Court of Appeal held,
    Parle was thus erroneously denied the opportunity to present
    critical testimony “relevant to the question whether [he] actu-
    ally had the mental state required for a first degree murder
    conviction.” Parle, No. H017348, slip op. at 31.
    Although this excluded testimony went to the only con-
    tested issue at trial and clearly undermined Parle’s defense,
    the California Court of Appeal nonetheless concluded that this
    error did not violate Parle’s due process rights because he
    PARLE v. RUNNELS                   13693
    “was permitted to present some expert testimony about his
    mental disorder,” including Dr. Jackman’s opinion that
    “[Parle’s] mental disorder caused him to experience stress,
    pressure, irritability, agitation, and mood swings,” and that “a
    manic episode may cause a person to become stressed, agi-
    tated, and possibly violent.” Id. at 34-35.
    As the district court noted, however, this alternative evi-
    dence “was a thin substitute for the evidence wrongfully
    excluded.” Parle III, 
    448 F. Supp. 2d at 1165
    . The evidence
    admitted—that manic episodes may cause a person “to
    become stressed, agitated, and possibly violent”—sheds very
    little light on whether Parle possessed the requisite state of
    mind for first-degree murder, whereas the evidence excluded
    —that bipolar disorder is characterized by impulsiveness and
    poor judgment, and that a person suffering from a manic epi-
    sode does not stop to consider consequences or alternatives—
    speaks directly to the only relevant issue: premeditation.
    The prejudicial effect of the erroneous exclusion of Dr.
    Jackman’s testimony was made worse during closing argu-
    ments: Parle’s counsel was specifically prevented from argu-
    ing the effects of a manic episode on deliberation. During his
    closing argument, Parle’s counsel argued that Parle was suf-
    fering from a manic episode at the time of the murder and “he
    was less likely to carefully consider his actions and less able
    to deal with the antagonism that was inherent in the relation-
    ship, apt to be more rash, more impulsive as a result of this
    disorder, less able to exercise good judgment.” The prosecutor
    objected, moving the court to instruct the jury there was no
    evidence to support “the last two or three assertions.” The
    objection was sustained, and the court instructed that
    “[a]rguments of counsel, whether it be the prosecution or the
    defense, are merely argument and not evidence.”
    The prosecution, however, was permitted to attack Parle’s
    defense and opine that “[t]he evidence is that bipolar disorder
    has not been testified to as diminishing a person’s ability to
    13694                      PARLE v. RUNNELS
    premeditate or deliberate at all.” Parle III, 
    448 F. Supp. 2d at 1166
    .
    c)    Cumulative Effect of Errors / Cumulative Nature of
    Evidence
    [4] Taken together, the wrongful admission of Dr. Acenas’s
    testimony and the erroneous exclusion of portions of Dr. Jack-
    man’s left the jury with only half the picture. It had reliable
    testimony from Parle’s own psychiatrist about Parle’s relative
    good mental health prior to the crime, as well as his history
    of violent tendencies and hatred for his wife—all supporting
    the prosecution’s argument for premeditation—but lacked
    critical evidence of whether Parle formed the requisite mental
    state in the midst of a manic episode caused by severe bipolar
    disorder, which clearly would have bolstered his defense. The
    cumulative effect of these two errors alone rendered Parle’s
    defense “far less persuasive than it might have been” and
    would have had a “substantial and injurious effect or influ-
    ence” on the jury’s verdict.12
    Like the evidence excluded in Chambers, this wrongfully
    admitted and excluded evidence went to the heart of the cen-
    12
    The State discounts the import of this medical testimony, noting the
    “overwhelming nature of all of the properly-admitted evidence establish-
    ing that [Parle] premeditated and deliberated the killing of his wife.”
    State’s Br. at 35. However, as discussed above, although the record con-
    tained other evidence establishing Parle’s violent tendencies, no other evi-
    dence so directly pertained to his mental state at the time of the crime.
    Furthermore, the State’s reliance on this court’s prior holding that the
    record contained “overwhelming evidence” of Parle’s intent misses the
    mark. See Parle I, 
    387 F.3d at 1044
    . There is no question that Parle
    intended to kill his wife; the only issue before the California Court of
    Appeal was his state of mind at the time of this intentional killing, i.e.,
    whether the killing was intentional and deliberated (first degree murder)
    or intentional but not deliberated (second degree murder). This court’s
    prior decision is silent as to the strength of the State’s evidence on this
    question.
    PARLE v. RUNNELS                    13695
    tral issue in the case. In Chambers, the excluded evidence per-
    tained to the identity of the shooter—Chambers’s primary
    defense—while, here, the erroneously admitted and excluded
    evidence pertained to the only relevant issue (and Parle’s only
    defense): Parle’s state of mind at the time of the crime. Fur-
    thermore, even if—as the California Court of Appeal
    concluded—the evidence in question was “cumulative” of
    other properly admitted evidence, the errors may nonetheless
    have tipped the scales against Parle and rendered his trial fun-
    damentally unfair. See Krulewitch, 
    336 U.S. at 444-45
    .
    Indeed, as discussed above, the erroneously excluded evi-
    dence in Chambers was also largely cumulative of other evi-
    dence properly before the jury, yet the Supreme Court had no
    difficulty concluding that the combined effect of the trial
    errors required reversal. See supra note 9; see also Parle III,
    
    448 F. Supp. 2d at 1167
     (discussing cumulative nature of evi-
    dence in Chambers).
    [5] In sum, the cumulative effect of the erroneous inclusion
    of Dr. Acenas’s testimony and wrongful exclusion of portions
    of Dr. Jackman’s testimony rendered Parle’s defense “far less
    persuasive,” infecting his trial with unfairness, and depriving
    him of due process. See Chambers, 
    410 U.S. at 294
    ; Don-
    nelly, 
    416 U.S. at 643
    . Furthermore, in view of the unique
    symmetry of these errors—by which each so starkly amplified
    the prejudice caused by the other—and their direct relation to
    the sole issue contested at trial, the California Court of
    Appeal’s conclusion to the contrary was objectively unreason-
    able, and Parle is entitled to habeas relief.
    2)   Additional Errors
    [6] The trial court’s errors did not end with the medical tes-
    timony. Rather, the prejudicial impact of those errors was
    exacerbated by the trial court’s additional errors in excluding
    evidence of Mary’s previous threats and character for vio-
    lence and admitting evidence of Parle’s previous violent
    threats against a police officer. Viewed collectively with the
    13696                  PARLE v. RUNNELS
    medical testimony errors, these errors undeniably rendered
    Parle’s defense “far less persuasive than it might have been”
    and thereby violated his due process rights.
    a)    Mary’s Character for Violence and Threats Against
    Parle
    The trial court also erred in excluding evidence pertaining
    to Mary’s character for violence and threats against Parle.
    First, the trial court erred in preventing Mary’s nurse from
    testifying that, thirteen days prior to the crime, Mary
    expressed “vindictiveness” toward Parle and had stated that
    she’d “like to hurt him” and “want[ed] to kill him.” Second,
    the trial court erroneously excluded as hearsay Parle’s testi-
    mony about Mary’s various threats against him, including her
    threat—four days before Parle’s crime—to kill him and their
    son.
    Once again, the California Court of Appeal held that the
    exclusion of this evidence, though erroneous, was harmless
    because it “was essentially cumulative of other evidence.” Id.
    at 56. As Chambers and Krulewitch make clear, just because
    evidence is cumulative does not necessarily render its wrong-
    ful exclusion harmless. Though true the record contained evi-
    dence of Mary’s history of violence toward Parle, the
    excluded testimony provided the only evidence of Mary’s
    threats to kill Parle in the days leading up to his crime. Fur-
    thermore, the bulk of the admitted testimony regarding
    Mary’s character came from “interested witnesses”—i.e.,
    Parle and his father—whereas the testimony of Mary’s nurse
    would have provided unbiased and seemingly reliable corrob-
    oration of the other evidence of Mary’s violent tendencies
    toward Parle.
    b)    Parle’s Threats Against a Police Officer
    Finally, the trial court also erred in admitting impermissible
    character evidence of Parle’s threats to a police officer five
    PARLE v. RUNNELS                   13697
    years prior to his crime, but concluded that the error was
    harmless in light of other evidence of Parle’s character for
    threatening violence. The inclusion of this evidence, espe-
    cially when coupled with the exclusion of certain evidence
    concerning Mary’s violent tendencies and threats against
    Parle, once again painted an incomplete picture for the jury:
    The evidence depicted Parle as an extremely violent individ-
    ual based on five-year-old allegations, yet neglected to dem-
    onstrate that Mary had threatened to kill Parle only days
    before. Given that the sole issue before the jury was Parle’s
    state of mind at the time of the crime, this unbalanced presen-
    tation necessarily undermined Parle’s defense.
    CONCLUSION
    [7] Because all of the trial court’s errors pertained to evi-
    dence relevant to the only issue before the jury—Parle’s state
    of mind at the time of the crime—and all of the improperly
    admitted evidence bolstered the State’s case, while all of the
    erroneously excluded evidence rendered Parle’s defense far
    less persuasive than it might have been, it was objectively
    unreasonable for the California Court of Appeal to conclude
    that the combined effect of these errors did not violate Parle’s
    due process rights. That the evidence in question may have
    been partially cumulative of other properly admitted evidence
    does not render the errors necessarily harmless because the
    State’s case establishing Parle’s premeditation was less than
    overwhelming, and the jury’s verdict is therefore more likely
    to have been affected by the trial court’s errors. See Strick-
    land, 
    466 U.S. at 696
    ; Krulewitch, 
    336 U.S. at 444-45
    ; see
    also Frederick, 
    78 F.3d at 1381
    .
    As in Chambers, the seminal cumulative error case, the
    errors in Parle’s trial went to the heart of the defense’s case
    and the only issue before the jury. The combined effect of the
    trial court’s multiple errors rendered Parle’s defense “far less
    persuasive than it might have been,” Chambers, 
    410 U.S. at 294
    , resulting in a “substantial and injurious effect or influ-
    13698                       PARLE v. RUNNELS
    ence” on the jury’s verdict, Brecht, 
    507 U.S. at 637
    , which
    “so infected the trial with unfairness as to make the resulting
    conviction a denial of due process,” Donnelly, 
    416 U.S. at 643
    . Further, under the unique and unfortunate circumstances
    of this case, the California Court of Appeal’s contrary conclu-
    sion was an objectively unreasonable application of clearly
    established federal due process law, as set forth in Chambers,
    Donnelly, and Brecht.13
    In so holding, like the Chambers Court itself, “we establish
    no new principles of constitutional law.” 
    410 U.S. at 302
    .
    “Rather, we hold quite simply that under the facts and circum-
    stances of this case the rulings of the trial court deprived
    [Parle] of a fair trial,” 
    id. at 302-03
    , and the California Court
    of Appeal’s decision to the contrary was objectively unrea-
    sonable because, in light of the one-sided impact of the multi-
    ple errors, “the[ir] collective presence . . . is devastating to
    one’s confidence in the reliability of this verdict.” Killian v.
    Poole, 
    282 F.3d 1204
    , 1211 (9th Cir. 2002).
    For the foregoing reasons, the district court’s order granting
    Parle’s habeas petition is AFFIRMED.
    13
    Cf. Thomas, 
    273 F.3d at 1180-81
     (combined effect of errors resulting
    in: (1) the admission of evidence establishing motive and access to murder
    weapon, (2) the admission of evidence of prior weapon use, (3) violation
    of defendant’s right to confront a key witness, and (4) the exclusion of evi-
    dence of an alternative perpetrator violated due process, and the “[state
    court’s] contrary conclusion [constituted] an unreasonable application of
    Donnelly’s well-established principles of due process law”).