Howell v. Trammell , 728 F.3d 1202 ( 2013 )


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  •                                                                         FILED
    United States Court of Appeals
    Tenth Circuit
    September 5, 2013
    PUBLISH                 Elisabeth A. Shumaker
    Clerk of Court
    UNITED STATES COURT OF APPEALS
    TENTH CIRCUIT
    MICHAEL WAYNE HOWELL,
    Petitioner - Appellant,
    v.                                       Nos. 02-6324 and 12-6014
    ANITA TRAMMELL, * Warden,
    Oklahoma State Penitentiary,
    Respondent - Appellee.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE WESTERN DISTRICT OF OKLAHOMA
    (D.C. Nos. CV-99-1803-A and 5:07-CV-01008-D)
    Steven M. Presson, Presson Law Office, Norman, Oklahoma (Robert W. Jackson,
    Jackson & Presson, P.C., Norman, Oklahoma, with him on the briefs in 02-6324),
    and Paul R. Bottei (Amy D. Harwell and Kelley J. Henry, Office of the Federal
    Public Defender, Middle District of Tennessee, Nashville, Tennessee, and Steven
    M. Presson, Presson Law Office, Norman, Oklahoma, with him on the motion in
    12-6014), Office of the Federal Public Defender, Middle District of Tennessee,
    Nashville, Tennessee, for Appellant.
    Jennifer J. Dickson, Assistant Attorney General (E. Scott Pruitt, Attorney General
    of Oklahoma, with her on the supplemental brief, and W. A. Drew Edmondson,
    Attorney General of Oklahoma, and Jennifer B. Miller, Assistant Attorney
    General, on the opening brief), Office of the Oklahoma Attorney General,
    Oklahoma City, Oklahoma, for Appellee.
    *
    Pursuant to Federal Rule of Appellate Procedure 43(c)(2), Anita
    Trammell is automatically substituted as the Respondent in this case.
    Before LUCERO, TYMKOVICH, and GORSUCH, Circuit Judges.
    TYMKOVICH, Circuit Judge.
    This appeal considers two petitions for habeas relief arising from the
    murder conviction and death sentence of Michael Wayne Howell. Howell’s first
    petition came before us in 2002. After the Supreme Court ruled that states could
    not impose capital punishment on persons with mental impairments, we abated
    that petition and allowed Howell to pursue a mental-disability challenge to his
    sentence in Oklahoma state court.
    In 2005, a state court jury found that Howell was not mentally retarded. 1
    Howell then filed a second petition, alleging seventeen grounds for relief from his
    mental-disability trial, in addition to the five grounds remaining from his first
    petition that were never considered by this court.
    1
    We acknowledge that “[i]n 2006, the American Association on Mental
    Retardation [] changed its name to the American Association on Intellectual and
    Developmental Disabilities []. ‘Intellectual disability,’ rather than ‘mental
    retardation,’ is now the preferred terminology. [Citation omitted.] Also, recently
    enacted federal legislation known as Rosa’s Law, Pub. L. No. 111–256, 
    124 Stat. 2643
     (2010), mandates the use of the term ‘intellectual disability’ in place of
    ‘mental retardation’ in all federal enactments and regulations. Nonetheless,
    throughout this opinion, we employ the old terminology because the legal sources
    relevant to our analysis, including Oklahoma law, our own prior opinions, and the
    opinions of the Supreme Court, use the terms ‘mental retardation’ and ‘mentally
    retarded.’” Hooks v. Workman, 
    689 F.3d 1148
    , 1159 n.1 (10th Cir. 2012).
    -2-
    We now conclude that Howell is not entitled to habeas relief on either
    petition. The state provided him a fundamentally fair mental retardation trial, and
    both his guilt phase and second penalty phase were free from prejudicial error.
    The one cognizable error from his first penalty phase—inappropriate contact
    between sheriff’s deputies and a juror—was corrected when Oklahoma’s appellate
    court reversed Howell’s first death sentence and remanded for a new penalty trial,
    which also resulted in a sentence of death. In sum, there is no ground on which
    we can disturb Howell’s conviction or sentence.
    Therefore, exercising jurisdiction under 
    28 U.S.C. §§ 1291
     and 2253(a), we
    affirm the district court’s denial of Howell’s first habeas petition, and we deny a
    certificate of appealability (COA) as to Howell’s second petition in case number
    12-6014 and dismiss that appeal.
    I. Background
    Howell and his girlfriend, Mona Lisa Watson, commenced a crime spree on
    November 2, 1987, that led to the deaths of two people. It began in a Shelby
    County, Tennessee, 7-Eleven market. As Watson was on her way out of the store
    with a six-pack of beer, Howell pulled out a silver .38 revolver and shot the store
    clerk, Alvin Kennedy, in the head, killing him. Howell and Watson then left the
    store and drove off.
    The two traveled west to Oklahoma. While driving, they drank beer and
    used cocaine. When they reached Del City, Oklahoma, Howell decided to exit the
    -3-
    highway and stop at a convenience store, where he purchased lighter fluid.
    According to Watson’s preliminary hearing testimony, their truck was low on gas,
    so the two were looking for another vehicle. Driving around town, they spotted a
    woman, later identified as United States Air Force Sergeant Charlene Calhoun,
    standing outside of an apartment complex next to her 1987 Toyota Tercel.
    Howell stopped his truck and approached her. He then shot Calhoun in the face. 2
    Watson helped Howell load Calhoun’s body into the Tercel. The two then
    poured the lighter fluid into the truck and set it on fire before driving off with the
    body in Calhoun’s car. A few miles down the highway, in a deserted area, they
    exited. After driving down a dirt road, they found what looked to be an
    abandoned trailer, and there they dumped the body. Back in the Tercel, Howell
    and Watson returned to Tennessee before continuing south to Florida.
    The Del City police found the abandoned, burnt truck by the apartment
    complex and learned that the truck, owned by the Lynn Whitsett Corporation of
    2
    Howell claims he was there to complete a drug deal with Calhoun on
    behalf of an interstate drug ring, and that, after an argument broke out about the
    terms of the deal, Calhoun brandished a knife. Thus, he claims he shot her in
    self-defense. But at the preliminary hearing, Watson denied there was a drug deal
    and testified that, in fact, Howell shot Calhoun without provocation so that they
    could steal her car. Watson recanted at trial, but no evidence was presented, other
    than Howell’s own testimony, showing that Howell was part of a drug ring or that
    Calhoun dealt drugs. Ultimately, the jury found Howell guilty of first-degree
    murder, and on habeas review of a jury verdict, we view the evidence in the light
    most favorable to the government. Jackson v. Virginia, 
    443 U.S. 307
    , 318–19
    (1979); see also Hooks v. Workman, 
    689 F.3d 1148
    , 1167 (10th Cir. 2012).
    -4-
    Memphis, Tennessee (Howell’s former employer), had been reported stolen. The
    police also found blood by the truck and began searching for Calhoun. Finally,
    on November 17, they found her badly decomposed body where Howell had left
    it—by a deserted trailer over four miles from the apartment complex.
    About two weeks later, on November 29, police officers in Panama City,
    Florida, spotted a 1987 Toyota Tercel with Tennessee plates that did not match
    the vehicle. When the officers tried to stop the car, Howell—sitting in the
    passenger seat—pulled out his revolver and fired at them. The police fired back,
    and Watson, in the driver’s seat, sped off. The police gave chase until Watson
    and Howell, who was shot in the leg and out of bullets, finally surrendered. The
    police later confirmed that the revolver Howell used during the car chase was the
    same silver .38 that he had used to kill Kennedy and Calhoun. The police also
    confirmed that the Tercel belonged to Calhoun.
    Howell and Watson stood trial in Oklahoma state court for the murder of
    Charlene Calhoun in 1988. They both were convicted. Howell received a
    sentence of death, and Watson received life in prison. Tennessee then tried
    Howell for the murder of Alvin Kennedy in 1989; Howell was convicted and
    again sentenced to death. This appeal concerns alleged errors in the Oklahoma
    trial and in that case’s subsequent proceedings. 3
    3
    For Howell’s Tennessee trial and subsequent proceedings in that case, see
    (continued...)
    -5-
    II. Procedural History
    A. First Trial
    Howell and Watson were tried together before a jury in Oklahoma state
    court for the first-degree murder of Sgt. Calhoun. The guilt phase began on
    November 28, 1988, and concluded on December 6, 1988, when the jury rendered
    a guilty verdict as to both Howell and Watson. At that point, because the
    prosecution was seeking a death sentence, the trial court sequestered the jury in a
    local motel for the penalty phase. After two more days of hearing evidence and
    argument, the jury recommended a sentence of death for Howell and life in prison
    for Watson. The court followed both recommendations.
    A few months after the trial, Howell’s defense attorneys learned that one of
    the jurors, Diana Smith, claimed to have engaged in inappropriate conduct with
    two sheriff’s deputies during the jury sequestration at the penalty phase. Juror
    Smith alleged that she had visited the deputies’ motel room at night and discussed
    the case with them. She also alleged intimate contact with one of the deputies.
    Based on these allegations and other purported errors during both phases of
    the trial, Howell appealed his conviction and sentence to the Oklahoma Court of
    Criminal Appeals (OCCA).
    3
    (...continued)
    generally State v. Howell, 
    868 S.W.2d 238
     (Tenn. 1993), cert. denied, 
    510 U.S. 1215
     (1994), and Howell v. State, No. W2009-02426-CCA-R3-PD, 
    2011 WL 2420378
     (Tenn. Crim. App. June 14, 2011).
    -6-
    B. First OCCA Decision
    Howell alleged numerous errors in this appeal, including juror misconduct;
    the trial court’s admission of Watson’s preliminary hearing transcript; its
    admission without a limiting instruction of testimony from Watson’s former
    attorneys, whom the prosecution called to rebut Watson’s claim that the State had
    coerced her preliminary hearing testimony; and the failure of one juror to reveal
    his employment history with the CIA during his voir dire. We discuss these
    allegations in more detail below.
    The OCCA affirmed the guilty verdict, finding no prejudicial error. See
    Howell v. State, 
    882 P.2d 1086
     (Okla. Crim. App. 1994) (Howell I). First, the
    OCCA concluded that the admission of Watson’s preliminary hearing transcript
    did not violate the Confrontation Clause, in part because the preliminary hearing
    testimony “was given in circumstances closely approximating those of a typical
    trial,” thereby satisfying the criteria articulated in California v. Green, 
    399 U.S. 149
     (1970), “to adequately safeguard [Howell]’s right of confrontation.” Howell
    I, 
    882 P.2d at
    1091 (citing Green, 
    399 U.S. at 165
    ). Further, the court observed
    that “cross examination at a preliminary hearing can . . . satisfy the confrontation
    requirement.” 
    Id.
     (citing Ohio v. Roberts, 
    448 U.S. 56
    , 72 (1980)).
    Second, Howell claimed that the trial court had “an affirmative duty to
    instruct the jury sua sponte that [the testimony of Watson’s former attorneys]
    could be used only for impeachment purposes and not for substantive purposes.”
    -7-
    Id. at 1094. The OCCA rejected that claim, saying the trial court’s failure to give
    a limiting instruction sua sponte “does not automatically constitute reversible
    error,” and that the failure did not rise to the level of “plain error” in Howell’s
    case. Id.
    Third, citing a prior OCCA decision, Tibbetts v. State, 
    698 P.2d 942
     (Okla.
    Crim. App. 1985), Howell argued that a juror’s “deliberate” withholding of his
    full employment history was inconsistent with fundamental fairness. Howell I,
    
    882 P.2d at 1089
    . The OCCA summarily rejected this argument, saying only,
    “[Howell]’s reliance on Tibbetts is misplaced, and the proposition is denied.” 
    Id.
    But based on the alleged juror misconduct during the penalty phase, the
    OCCA reversed Howell’s death sentence and remanded for resentencing. The
    court described the alleged misconduct in some detail, including that the juror met
    with the deputies in their motel room during the penalty phase, that they
    discussed her guilt-stage deliberations, that they drank alcoholic beverages
    together, and that, on at least one night, they engaged in “some form of sexual
    activity.” 
    Id. at 1094
    . Acknowledging the “impermissive, unauthorized and
    improper contacts by the deputies with” the juror, the court concluded that it
    “must remand this case for resentencing.” 
    Id. at 1095
     (emphasis in original).
    -8-
    C. Second Penalty Phase
    A second penalty phase trial was held in 1996. 4 The jury found the
    existence of three aggravating circumstances: (1) Howell was previously
    convicted of a felony involving the use or threat of violence; (2) the murder was
    committed for the purpose of avoiding or preventing a lawful arrest or
    prosecution; and (3) Howell probably would commit future acts of violence and
    thus posed a continuing threat to society. As a result, the jury recommended a
    punishment of death, and the trial court sentenced accordingly.
    D. Second OCCA Decision
    Howell again appealed, raising sixteen alleged errors, including that the
    court erred in not granting a new guilt phase trial in light of the outrageous juror
    misconduct during the first penalty phase, and that Howell’s counsel from the
    second penalty phase was constitutionally ineffective for telling the jury that
    Howell was already on death row at the Oklahoma State Penitentiary.
    The OCCA affirmed in full. See Howell v. State, 
    967 P.2d 1221
     (Okla.
    Crim. App. 1998), cert. denied, 
    528 U.S. 834
     (1999) (Howell II). On Howell’s
    request for a new guilt phase trial, the court noted that Howell was using the same
    evidence in his second appeal as he used in his first. Id. at 1224. Therefore, the
    4
    Court proceedings in both Oklahoma and Tennessee caused the delay.
    -9-
    OCCA concluded its prior decision to remand only for resentencing was “res
    judicata,” and it would not revisit the issue. Id.
    On Howell’s ineffective-assistance-of-counsel (IAC) claim, the court found
    “it was counsel’s strategy to show that [Howell] had been a model prisoner while
    on death row, thereby rebutting the continuing[-]threat aggravating
    circumstance.” Id. at 1226. The court refused to “second guess trial strategy,”
    and denied the claim. Id.
    The OCCA also engaged in a full sentence review, as mandated by
    Oklahoma law. See 
    Okla. Stat. tit. 21, § 701.13
    (C) (1991). The court found
    support for each of the three aggravating factors. For the first factor, the court
    identified nine prior convictions against Howell involving the use of threat, force,
    or violence, including two counts of attempted murder in the first degree and one
    count of murder in the first degree during the commission of a robbery. Howell
    II, 
    967 P.2d at 1229
    . For the second factor, the court observed that “[Howell]
    sought to avoid arrest or prosecution for the theft of Sgt. Calhoun’s vehicle” by
    removing her body from the scene of the murder and hiding it over four miles
    away before absconding with her car. 
    Id. at 1227
    . And for the third factor, the
    court found that “the callous nature of the crime, [Howell]’s blatant disregard for
    the importance of human life, and his demonstrated pattern of criminal conduct
    render him a continuing threat to society.” 
    Id. at 1229
    .
    -10-
    The court next reviewed Howell’s mitigation evidence. It listed eleven
    different claims Howell offered in mitigation, including that “his childhood was
    poor and violent,” that “he suffers from a brain dysfunction,” and that “he never
    received any intervention to recognize and treat his deficiencies.” 
    Id.
    Acknowledging Howell’s mitigation case, the court nevertheless concluded that
    the death sentence was “factually substantiated and appropriate.” 
    Id.
     The court
    also found that the penalty was imposed without the influence of juror “passion,
    prejudice[,] or any other arbitrary factor.” 
    Id.
     Thus, the death sentence was
    affirmed.
    E. First Habeas Petition
    After exhausting Oklahoma’s post-conviction review, Howell filed a 
    28 U.S.C. § 2254
     petition in federal court in 2000, raising ten grounds for relief. In
    2002, the district court denied relief on all grounds, and Howell appealed only as
    to five.
    Also in 2002, the Supreme Court decided Atkins v. Virginia, 
    536 U.S. 304
    (2002), holding that the Eighth Amendment barred the death penalty for persons
    with severe mental disabilities. At the time, Howell’s appeal from the denial of
    his first habeas petition was before us. Howell requested that we hold his appeal
    in abeyance while he pursued relief from his death sentence in state court under
    an Atkins theory. We abated the appeal.
    -11-
    F. Atkins Trial
    The Oklahoma courts determined that a trial was necessary to decide
    Howell’s mental capacity. A jury trial commenced for that purpose on May 23,
    2005. Howell elected not to be present. Three witnesses—a psychologist (Dr.
    Daniel Grant) and two of Howell’s siblings—testified on Howell’s behalf. Four
    witnesses—a psychologist (Dr. John Hutson), Howell’s former prosecutor, a
    police officer, and Howell’s former co-defendant and current wife (Watson)—
    testified for the State. The judge instructed the jury to find Howell “mentally
    retarded” under Oklahoma law if Howell proved by a preponderance of the
    evidence (1) that he had significant subaverage intellectual functioning (i.e., an
    IQ below 70), (2) which manifested itself before he was eighteen years of age,
    and (3) that he had significant limitations in adaptive functions. On May 27,
    2005, the jury unanimously decided that Howell was not mentally retarded.
    G. Third OCCA Decision
    Howell appealed the jury’s Atkins determination to the OCCA, raising
    eleven propositions of error, including that the facts proven at trial demonstrated
    his mental retardation as a matter of law, and that the trial court should have
    placed the burden of proof on the government.
    The OCCA affirmed the jury’s decision. See Howell v. State, 
    138 P.3d 549
    (Okla. Crim. App. 2006) (Howell III). Reviewing the evidence “in a light most
    favorable to the State,” the OCCA found the record supported the verdict. 
    Id.
     at
    -12-
    562. The court observed that Howell’s IQ scores ranged from 62 through
    91—more than enough for a jury to conclude that Howell’s true IQ was not below
    70. See 
    id.
     at 562–63.
    The court also noted, “Other evidence, besides the testing scores, suggested
    that Howell was not limited in his abilities to understand and process information,
    not limited in communications [sic] skills, was able to learn from experiences or
    mistakes, was able to engage in logical reasoning, and was able to understand the
    reactions of others.” 
    Id. at 563
    . The court then highlighted Howell’s hand-
    written letters to Watson, whom Howell married while both were in prison, and
    Howell’s testimony at trial in 1988 and before a judge in 1996.
    On Howell’s burden-of-proof argument, the OCCA re-affirmed its prior
    decisions giving the defendant the burden to prove mental retardation by a
    preponderance of the evidence. 
    Id.
     at 562 (citing, inter alia, Myers v. State, 
    130 P.3d 262
    , 265 (Okla. Crim. App. 2005)). The court explained, “[That] a
    defendant is not mentally retarded is not an aggravating circumstance which the
    State must prove beyond a reasonable doubt. . . . Eligibility for the death penalty
    is a different issue than proof of an aggravating circumstance.” 
    Id.
     at 561 (citing
    
    Okla. Stat. tit. 21, § 701.12
     (2001)).
    The court also correctly noted that several other states—including
    Louisiana, New York, South Carolina, and Tennessee—likewise allocated the
    burden of proof to the defendant. See State v. Anderson, 
    996 So. 2d 973
    , 984–85
    -13-
    (La. 2008); People v. Smith, 
    751 N.Y.S.2d 356
    , 357 (N.Y. Sup. Ct. 2002); State v.
    Laney, 
    627 S.E.2d 726
    , 730–32 (S.C. 2006); Howell v. State, 
    151 S.W.3d 450
    ,
    467 (Tenn. 2004); see also Howell, 
    151 S.W.3d at 467
     (listing more states of
    accord, including Georgia, Mississippi, New Mexico, Ohio, Texas, and Virginia). 5
    Hence, the OCCA denied this ground for relief as well.
    H. OCCA’s Post-Conviction Review of the Atkins Trial
    After the appeal, Howell filed another petition for post-conviction relief in
    state court, raising several claims of ineffective assistance of counsel during the
    trial on mental retardation. As relevant here, Howell alleged that the prosecution
    struck jurors based on their race, in violation of Batson v. Kentucky, 
    476 U.S. 79
    (1986), and that his counsel was constitutionally ineffective for failing to object.
    Howell also alleged that his trial counsel failed to exclude key parts of the state
    expert Dr. Hutson’s testimony, and that counsel failed to include testimony from
    Howell’s former high school teacher showing that Howell had been enrolled in
    special education classes.
    The OCCA denied post-conviction relief. See Howell v. State, No.
    PCD-2006-712, slip op. (Okla. Crim. App. Sept. 10, 2007) (unpublished) (Howell
    5
    The OCCA acknowledged that, at the time of its decision, a New Jersey
    court had placed the burden of proof on the prosecution. But following the
    OCCA’s decision, the New Jersey Supreme Court reversed the lower court, and
    now New Jersey also allocates the burden of proof to the defendant. See State v.
    Jimenez, 
    908 A.2d 181
    , 190 (N.J. 2006).
    -14-
    IV). The court rejected the Batson claim because “[Howell] failed to demonstrate
    that the prosecutor lacked a race-neutral explanation for the strikes [Howell]
    complains about.” Id. at 5. The court rejected the related IAC claim because it
    “presume[d], in the absence of any information to the contrary, that counsel had a
    sound strategic reason for not objecting to the removal of these panelists.” Id.
    And the court rejected Howell’s IAC claim regarding the failure to object to Dr.
    Hutson’s testimony because the court did not believe that the testimony was
    inadmissible in the first place, and in the alternative, it concluded the error was
    not prejudicial given all the other testimony from both sides about Howell’s IQ
    and the uncertainty of IQ testing. Id. at 8–11.
    Lastly, the OCCA rejected Howell’s IAC claim regarding the failure to
    include the teacher’s testimony because, according to the court, the error was not
    prejudicial. The court noted that Howell already presented his siblings’ testimony
    that he was in special education classes with them in high school, and the
    prosecution rebutted that testimony with Howell’s high school transcripts, which
    do not show him in special education classes (while his siblings’ transcripts do
    show that they were in such classes). Hence, reasoned the court, adding
    additional testimony that Howell actually was in special education classes still did
    not explain why his school records showed otherwise. The court concluded,
    “Given [his siblings’ testimony], along with extensive testimony from the defense
    expert, we fail to see how the very cursory information [Howell] provides from
    -15-
    [the teacher] would have added materially to the defense case, or how it could
    have altered the outcome of the trial.” Id. at 21.
    I. Second Habeas Petition
    After exhausting all state court remedies, Howell filed his second federal
    habeas petition, alleging various errors in his Atkins trial. The district court
    denied all relief. It also declined to grant a COA, meaning the court concluded
    that no reasonable jurist could debate whether Howell’s petition should have been
    resolved differently or deserved encouragement to proceed further. See, e.g.,
    Slack v. McDaniel, 
    529 U.S. 473
    , 484 (2000).
    Without a COA from the district court, Howell could not appeal the denial
    of his second habeas petition unless he received a COA from this court, see 
    28 U.S.C. § 2253
    (c)(1)(A); see also Fed. R. App. P. 22(b)(1), which is what Howell
    requested next. Specifically, he asked that we grant him a COA to appeal four of
    the seventeen grounds for relief before the district court (although, in what he
    labels a fifth ground, Howell also attempts to incorporate by reference every other
    ground for relief presented to the district court).
    As part of our case management, we reviewed Howell’s request for a COA.
    Like the district court, we too denied the request, but we gave Howell fourteen
    days to file a motion to reconsider. Howell timely moved for our reconsideration.
    We then consolidated Howell’s pending motion with his appeal from the district
    -16-
    court’s denial of his first habeas petition, which had been held in abeyance until
    now.
    We now address the merits of Howell’s first appeal before turning to his
    motion to reconsider his COA request.
    III. Discussion
    Howell raises five challenges to his original guilt phase trial in 1988 and
    subsequent retrial for sentencing in 1996. As to his guilt phase trial, Howell
    argues that (1) the juror misconduct responsible for reversing his first death
    sentence also required granting him a new trial on guilt; (2) the admission of
    Watson’s preliminary hearing testimony at their joint trial violated his
    Confrontation Clause rights; and (3) one juror’s failure to fully disclose his prior
    employment history deprived Howell of a fair and impartial jury. He also claims
    that (4) his Confrontation Clause rights were violated when Watson’s former
    attorneys were allowed to testify about prior communications with Watson during
    his and Watson’s joint trial, a claim which Howell says the OCCA failed to
    address. As to his retrial for sentencing, Howell argues that (5) his counsel was
    constitutionally ineffective in revealing to the jury that Howell was already on
    death row.
    Before reviewing each of these five challenges, we explain our standard of
    review.
    -17-
    A. Standard of Review
    Our review of the decisions in this case is governed by the Antiterrorism
    and Effective Death Penalty Act of 1996 (AEDPA). Under AEDPA, when a state
    court has reviewed a claim on its merits, federal habeas relief may be granted
    only if the state court’s decision (1) was contrary to or involved an unreasonable
    application of “clearly established Federal law,” or (2) was based upon an
    unreasonable determination of the facts in light of the evidence presented at trial.
    
    28 U.S.C. § 2254
    (d). “[C]learly established Federal law” is limited to Supreme
    Court “holdings, as opposed to the dicta, . . . as of the time of the relevant
    state-court decision.” Carey v. Musladin, 
    549 U.S. 70
    , 74 (2006) (quoting
    Williams v. Taylor, 
    529 U.S. 362
    , 412 (2000)). Further, a state court’s
    determination of a factual issue is “presumed to be correct,” and the petitioner has
    “the burden of rebutting the presumption of correctness by clear and convincing
    evidence.” 
    28 U.S.C. § 2254
    (e)(1).
    “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, 
    131 S. Ct. 770
    , 786 (2011). In
    other words, AEDPA review goes no further than “preserv[ing] authority to issue
    the writ [of habeas corpus] in cases where there is no possibility fairminded
    jurists could disagree that the state court’s decision conflicts with [the Supreme]
    Court’s precedents.” 
    Id.
     (emphasis added). Federal habeas is “not a substitute
    -18-
    for ordinary error correction through appeal”; it only “guard[s] against extreme
    malfunctions in the state criminal justice systems.” 
    Id.
     (internal quotation marks
    omitted).
    With our standard of review in mind, we turn to Howell’s claims of error
    from the guilt phase of his trial—including one claim, discussed last, that Howell
    asserts is not governed by AEDPA—before turning to Howell’s claim of error
    from his second penalty phase.
    B. Guilt Phase
    1. Juror Misconduct
    a. Factual Background
    At the conclusion of the guilt phase in 1988, the trial court ordered that the
    jury be sequestered in a local motel for the duration of the penalty phase. After
    the penalty phase concluded, the trial court entered a death sentence against
    Howell pursuant to the jury’s recommendation. Months later, an investigation
    began into alleged wrongdoing during the jury’s sequestration. From that
    investigation, Howell learned the following:
    [O]n the first night the jury was sequestered, both
    [sheriff’s] deputies [charged with juror security]
    informed one of the jurors[, Diana Smith,] that they
    knew she was the only holdout for not guilty in the first
    stage. According to [Smith’s] affidavit, Deputy Green
    told her, “that if it made me feel any better that he didn’t
    believe [Howell’s] story.” On the second night of
    sequestration, after second stage evidence was presented
    but before sentencing deliberations, both deputies asked
    -19-
    her if she felt better about voting for guilt after hearing
    that [Howell] had committed a murder in Tennessee.
    They assured her that she had “done the right thing.” As
    to second stage defense witness, Dr. Jonathon Lipman,
    Deputy Canon ridiculed his credentials and laughed at
    his testimony which he considered boring. According to
    both [Juror Smith] and Deputy Cannon, they drank
    alcoholic beverages in the Deputies’ hotel room on two
    successive nights and engaged in some form of sexual
    activity. [Juror Smith] stated that she was “hung over”
    during the punishment stage.
    Howell I, 
    882 P.2d at 1094
    .
    b. Legal Background
    “In a criminal case, any private communication, contact, or tampering
    directly or indirectly, with a juror during a trial about the matter pending before
    the jury is, for obvious reasons, deemed presumptively prejudicial . . . .” Remmer
    v. United States, 
    347 U.S. 227
    , 229 (1954) (emphasis added).
    c. OCCA’s Decision
    In light of the above allegations, the OCCA reversed Howell’s death
    sentence and remanded for re-trial of the penalty phase only. Howell I, 
    882 P.2d at 1095
    . Howell received the death penalty. After the second penalty phase,
    Howell again raised Juror Smith and the deputies’ misconduct as grounds for
    reversing his conviction. But the OCCA declined to revisit its earlier decision
    because Howell presented no new evidence showing material contact with the
    deputies during the guilt phase. See Howell II, 
    967 P.2d at 1224
    . The evidence
    -20-
    Howell did cite—Juror Smith’s affidavit from 1989—had already been before the
    OCCA during the first appeal, and the OCCA declined to revisit it. See 
    id.
    d. Analysis
    The central issue here is whether Juror Smith communicated with sheriff’s
    deputies about the case before finding Howell guilty. Any communication
    between the deputies and jurors after the guilt phase—i.e., during the penalty
    phase—is beside the point, since the OCCA already reversed the first penalty
    phase and remanded for a new trial on Howell’s sentence.
    Howell cites only one pre-guilty-verdict communication: After closing
    arguments at the guilt phase, Juror Smith asked the two deputies whether they
    were armed. The deputies answered that “one was armed and one was not” but
    “would not say which one.” Supp. App., Diana Smith Aff. (Mar. 10, 1989) at 2.
    “When asked why only one was armed, they replied that they had their reasons.”
    
    Id.
     This evidence, which is from Juror Smith’s 1989 affidavit, was previously
    before the OCCA both in Howell I and in Howell II.
    Our review of the record confirms that this was the only communication
    between Juror Smith and the deputies before the guilty verdict. Further, Juror
    Smith also confirmed in a later interview to investigators that, “[o]ther than [the
    part about whether or not the deputies were armed], everything else was said . . .
    after the voting was in on the [guilt] stage . . . .” Supp. App., Report of
    Investigation into Misconduct (Oct. 9, 1990) at 64 (emphasis added).
    -21-
    Even if Juror Smith’s allegations are true, the comment about the deputies
    being armed is not enough to grant habeas relief. No presumption of prejudice
    exists because the communication was not “about the matter pending before the
    jury.” Remmer, 
    347 U.S. at 229
    . And the decision to remand for resentencing
    only—rather than for an entirely new trial on guilt—does not violate any clearly
    established law where the only pre-guilty-verdict contact was about one deputy
    being armed and the other unarmed.
    The cases Howell cites do not support a different result. In Remmer, an
    unknown person allegedly told a juror during the trial that the juror “could profit
    by bringing in a verdict favorable to the petitioner.” 
    Id. at 228
    . The comment
    went to the heart of the trial’s integrity. In a second case Howell points to,
    Turner v. Louisiana, 
    379 U.S. 466
     (1965), the two principal witnesses for the
    prosecution were the very sheriff’s deputies who “drove the jurors to a restaurant
    for each meal, and to their lodgings each night,” and who ate with, conversed
    with, and did errands for the jurors. 
    Id.
     at 467–68. And in Parker v. Gladden,
    
    385 U.S. 363
     (1966), before rendering a verdict, several jurors overheard a bailiff
    say the defendant was a “wicked fellow” and “guilty” and that the Supreme Court
    “will correct it” if the defendant turns out to be innocent. 
    Id.
     at 363–64.
    In each of these cases, the Supreme Court reversed the guilty verdicts
    because outsiders communicated with the jurors about the case before them or,
    like the deputy-witnesses in Turner, fraternized with the jurors in a way that
    -22-
    could prejudice how the jury credited a witness’s testimony. In Howell’s guilt
    phase, by contrast, we do not have a communication about the “matter pending
    before the jury,” nor do we have officers in charge of the jury also serving as
    witnesses for the prosecution. The OCCA contravened no clearly established
    Supreme Court precedent in affirming the guilt phase verdict despite the one
    pre-verdict comment.
    Nor can we overturn the OCCA’s decision to deny Howell an evidentiary
    hearing. The record directly contradicts any claim that comments about the case
    were made before the guilty verdict. We see no basis for an evidentiary hearing.
    See Littlejohn v. Trammell, 
    704 F.3d 817
    , 857–58 (10th Cir. 2013) (even where a
    petitioner diligently developed the factual basis for his claim, he is not entitled to
    an evidentiary hearing if his claim is contravened by the existing factual record).
    Moreover, both Howell and the State had an opportunity to interview all of the
    jurors back in 1989, and neither found any evidence of pre-guilt communication
    other than the comment about the deputies carrying a weapon. And since 1989,
    Howell has not “diligently sought to develop the factual basis underlying” this
    claim further, so AEDPA deference applies to the OCCA’s decision to deny an
    evidentiary hearing. Smallwood v. Gibson, 
    191 F.3d 1257
    , 1266 (10th Cir. 1999).
    Under AEDPA deference, the decision cannot be overturned.
    Accordingly, we affirm the district court’s denial of relief on this ground.
    -23-
    2. Co-Defendant’s Preliminary Hearing Testimony
    a. Factual Background
    Howell next alleges the Oklahoma trial court violated his Confrontation
    Clause rights when it admitted his co-defendant Watson’s preliminary hearing
    transcript into evidence at their joint trial.
    The record reveals that Ms. Watson, pursuant to a plea
    bargain agreement, agreed to testify on behalf of the
    State. She did so at the preliminary hearing. Her
    testimony provided the evidence to support the malice
    aforethought element of the first degree murder charge.
    She admitted during the preliminary hearing that she and
    [Howell] drove around the apartment complex looking
    for a car to steal. She admitted that she spoke to Ms.
    Calhoun for the purpose of diverting her attention while
    [Howell] shot her. She testified that she burned the
    truck they were driving and helped to load Sgt.
    Calhoun’s body into her car.
    Ms. Watson subsequently changed her mind about the
    agreement, alleging that she was the target of coercion
    and suggestion with respect to the substance of her
    preliminary hearing testimony. Several pre-trial motions
    and hearings were had on this issue as well as objections
    at trial. The trial court overruled the motions and
    objections to the admission of the preliminary hearing
    testimony at trial.
    Howell I, 
    882 P.2d at 1090
    .
    b. Legal Background
    The Sixth Amendment’s Confrontation Clause guarantees all criminal
    defendants “the right . . . to be confronted with the witnesses against [them].”
    U.S. Const. amend. VI. Howell’s Confrontation Clause claims are governed by
    -24-
    the Supreme Court’s decision in Ohio v. Roberts, 
    448 U.S. 56
     (1980). 6 In
    Roberts, the Supreme Court established two components for evaluating these
    claims. First, “the prosecution must either produce, or demonstrate the
    unavailability of, the declarant whose statement it wishes to use against the
    defendant.” 
    Id. at 65
    . Second, “once a witness is shown to be unavailable,” the
    witness’s hearsay is permitted only if it is supported by “indicia of reliability.”
    
    Id.
     at 65–66 (internal quotation marks omitted). Roberts recognized two indicia
    of reliability: (1) “a firmly rooted hearsay exception,” or (2) “a showing of
    particularized guarantees of trustworthiness.” 
    Id. at 66
    .
    c. OCCA’s Decision
    The OCCA concluded that the admission of Watson’s preliminary hearing
    transcript did not violate Howell’s confrontation right. The court reasoned that
    Watson was unavailable at trial because she had changed her mind about a
    previous plea agreement and refused to testify for the State or against Howell.
    Under Oklahoma law, “a person charged with a crime is a privileged witness who
    cannot be made to testify (except at his or her own request) in a trial where the
    person or any co-defendant is being tried for the respective charge.” Howell I,
    
    882 P.2d at
    1090 (citing 
    Okla. Stat. tit. 22, § 701
    ). The OCCA explained, “[I]t
    6
    We cannot grant Howell relief based on the Supreme Court’s subsequent
    decision in Crawford v. Washington, 
    541 U.S. 36
     (2004), because Howell’s trial
    and direct appeals concluded before the Supreme Court decided Crawford. See
    Whorton v. Bockting, 
    549 U.S. 406
    , 409 (2007).
    -25-
    would have resulted in prejudicial error if the State had called co-defendant
    Watson to the stand with knowledge that she would invoke her privilege against
    self[-]incrimination.” Id. at 1091. In any event, noted the court, Watson’s
    preliminary hearing testimony “was given in circumstances closely approximating
    those of a typical trial.” Id. She testified “under oath in a truth-inducing
    courtroom atmosphere,” and Howell “was represented by counsel, through whom
    [he] had ample opportunity to cross examine Ms. Watson.” Id. Accordingly, the
    court denied relief on this claim.
    d. Analysis
    Howell argues the admission of Watson’s preliminary hearing testimony
    violated his Confrontation Clause rights because Watson was not “unavailable” as
    required by the Roberts test. But the OCCA decided that Watson was
    “unavailable” according to Oklahoma law and that, in any event, her preliminary
    hearing testimony was sufficiently reliable to be admissible under Roberts and
    another Supreme Court decision, California v. Green, 
    399 U.S. 149
     (1970).
    Howell cites no holding to the contrary of the OCCA’s decision, nor can
    he. At the time of his trial and appeal, the Supreme Court had already affirmed
    the use of preliminary hearing testimony where, as here, the defendant “had an
    effective opportunity for confrontation at the subsequent trial” and the witness’s
    preliminary hearing testimony “had already been given under circumstances
    -26-
    closely approximating those that surround the typical trial.” 
    Id. at 165
    . Thus,
    under AEDPA deference, we cannot disturb the OCCA’s decision.
    What is more, Watson’s preliminary hearing transcript could have been
    admitted at trial without violating Howell’s confrontation right regardless of
    Watson’s availability at trial. In Green, the witness whose preliminary hearing
    testimony was admitted against the defendant had been cross-examined by the
    defendant at trial. See 
    id.
     at 151–52. But the Supreme Court explained that the
    witness’s preliminary hearing testimony would have been admissible even if he
    had been unavailable at trial. 
    Id. at 165
     (emphasis added). This was so because,
    at the preliminary hearing, the witness was “under oath”; the defendant was
    “represented by counsel” and had “every opportunity to cross-examine” the
    witness; and “the proceedings were conducted before a judicial tribunal, equipped
    to provide a judicial record of the hearings.” 
    Id.
     Under those circumstances,
    explained the Court, preliminary hearing testimony is “admissible at trial even
    . . . if [the witness] had been actually unavailable.” 
    Id.
     Later, the Court
    incorporated this analysis into its test in Roberts. See Roberts, 
    448 U.S. at
    68–74.
    Because all the circumstances listed in Green were present here as well,
    Watson’s preliminary hearing transcript could have been admitted without
    violating Howell’s confrontation right, whether Watson was “available” for cross-
    examination or not. Hence, all of Howell’s arguments about Watson’s
    availability are beside the point.
    -27-
    The four arguments Howell makes to the contrary do not demand a
    different result. He argues, first, that the Supreme Court’s decision in Barber v.
    Page, 
    390 U.S. 719
     (1968), requires more than just Howell’s cross-examination of
    Watson at the preliminary hearing to admit that testimony against Howell at trial.
    But the Supreme Court’s holding in Barber is not supportive. In Barber, the
    prosecution presented as evidence against Barber a preliminary hearing transcript
    of a co-defendant who was not present at trial. The Court reversed Barber’s
    conviction because his Confrontation Clause right was violated where the
    prosecution “ma[d]e no effort to produce [the co-defendant] at trial.” 
    Id. at 725
    .
    And Barber, moreover, did not cross-examine the witness at the preliminary
    hearing either. Here, by contrast, Watson was present at Howell’s trial, and he
    did confront her through cross-examination at the preliminary hearing and when
    she testified on her own behalf. See Trial Tr., Vol. VI, at 161–67. The
    prosecution’s error in Barber—not having the co-defendant available for cross-
    examination at trial—is absent in this case.
    Second, Howell asserts Roberts does not allow using prior testimony where,
    as here, the prior testimony is not reliable because, as Howell puts it, Watson had
    “every motive to fabricate” her prior testimony. Aplt. Br. at 36. It is true that
    Roberts does not permit the use of unreliable hearsay testimony. 
    448 U.S. at 66
    .
    But the determination of whether Watson’s prior testimony was reliable
    belonged to the state court. And, as the record shows, Watson’s preliminary
    -28-
    hearing testimony bore sufficient indicia of reliability for the OCCA’s decision to
    survive AEDPA deference. Watson was under oath, Howell was represented by
    trial counsel who cross-examined Watson extensively, the hearing was before a
    judicial tribunal, the hearing was recorded, and, at trial, both the direct and
    cross-examinations were read to the jury (with only a few exceptions not relevant
    here). More significantly, Watson later testified at Howell’s trial and was again
    cross-examined by Howell’s counsel. As in Roberts, “[s]ince there was an
    adequate opportunity to cross-examine [Watson], and counsel . . . availed himself
    of that opportunity, the transcript . . . bore sufficient indicia of reliability and
    afforded the trier of fact a satisfactory basis for evaluating the truth of the prior
    statement.” 
    Id. at 73
     (internal quotation marks omitted).
    Third, Howell suggests the OCCA’s decision violated the Supreme Court’s
    holding in Bruton v. United States, 
    391 U.S. 123
     (1968). In Bruton, the Court
    held that the admission of one defendant’s confession implicating a second
    defendant at a joint trial constituted prejudicial error even though the trial court
    gave clear instructions that the confession could be used only against the first
    defendant, not against the second. 
    Id. at 126
    . But Bruton does not apply here,
    because Watson’s testimony at her preliminary hearing could be used against both
    defendants. The problem in Bruton was that the co-defendant, Evans, never took
    the stand, so Bruton could never confront him through cross-examination. See 
    id.
    -29-
    at 127–28. By contrast, here, Howell was able to cross-examine Watson both at
    her preliminary hearing and at their joint trial.
    Fourth and finally, Howell argues that a Sixth Circuit case, Earhart v.
    Konteh, 
    589 F.3d 337
     (6th Cir. 2009) (granting habeas relief based on the
    unconstitutional admission of hearsay), dictates granting habeas relief here. But
    Earhart is not “clearly established Federal law” for purposes of AEDPA because
    it is not a Supreme Court holding. See Carey, 
    549 U.S. at 74
    ; see also House v.
    Hatch, 
    527 F.3d 1010
    , 1018 (10th Cir. 2008). Besides, Earhart is distinguishable
    from this case because it involved a minor victim who could have been available
    at trial but was not—which does not apply here because Watson was at trial and
    was cross-examined by Howell.
    Accordingly, we affirm the district court’s denial of relief on this ground.
    3. Juror Candor
    a. Factual Background
    During jury selection for Howell’s 1988 trial, one of the potential jurors,
    Les Bays, who later served as the jury foreman, failed to reveal eight years of
    prior employment with the CIA. (He did, however, reveal his over twenty years
    of work for the Marine Corps, along with other past jobs.) Howell’s attorney
    discovered this omission after trial. In subsequent proceedings, when Howell’s
    counsel asked why Bays did not reveal this information, Bays responded, “You
    didn’t ask the right questions.” Howell I, 
    882 P.2d at 1089
    . On direct appeal to
    -30-
    the OCCA, Howell claimed that, had he known Bays used to work for the CIA, he
    would have excluded him on a peremptory challenge because “CIA activities are
    akin to law enforcement connections.” 
    Id.
    b. Legal Background
    “A trial represents an important investment of . . . resources, and it ill
    serves the important end of finality to wipe the slate clean simply to recreate the
    peremptory challenge process because counsel lacked an item of information
    which objectively he should have obtained from a juror on voir dire
    examination.” McDonough Power Equip., Inc. v. Greenwood, 
    464 U.S. 548
    , 555
    (1984). Accordingly, to obtain a new trial on appeal, “a party must first
    demonstrate that a juror failed to answer honestly a material question on voir
    dire, and then further show that a correct response would have provided a valid
    basis for a challenge for cause.” 
    Id. at 556
     (emphasis added).
    c. OCCA’s Decision
    The OCCA summarily rejected this claim, saying only, “[Howell], citing
    Tibbetts v. State, 
    698 P.2d 942
    , 945 (Okla. Crim. App. 1985), argues that juror
    Bays’ deliberate withholding of pertinent information was ‘not consistent with the
    principles of fundamental fairness.’ [Howell]’s reliance on Tibbetts is misplaced,
    and the proposition is denied.” Howell I, 
    882 P.2d at 1089
    .
    -31-
    d. Analysis
    Howell claims that, had Juror Bays revealed his work with the CIA, Howell
    would have used a peremptory challenge. But even so, Howell is not entitled to
    habeas relief. See McDonough, 
    464 U.S. at 555
     (rejecting a request to grant a
    new trial “simply to recreate the peremptory challenge process”).
    Howell also claims that Juror Bays’s previous employment with the CIA
    was a basis for finding juror bias and thus a valid challenge for cause. This claim
    turns on the second prong of the McDonough test—whether Howell can show that
    “a correct response would have provided a valid basis for a challenge for cause”
    based on juror bias. We now turn to whether Howell has shown that Bays’s
    omission demonstrates juror bias. We conclude that it does not.
    “[E]ven where the issues were more closely related than they are in the
    instant case, we have declined to infer juror bias.” United States v. McConnel,
    
    464 F.3d 1152
    , 1157 (10th Cir. 2006).
    In Gonzales v. Thomas, 
    99 F.3d 978
     (10th Cir. 1996), no
    bias, actual or implied, was found . . . [where] the juror
    in question had been a rape victim 24 years earlier, and
    the prosecution there was for rape and armed robbery.
    Nevertheless, despite some similarities in the types of
    cases, [we] held that the juror did not show actual bias,
    nor had she deliberately concealed her experience during
    voir dire. . . . [We] also found no implied bias.
    
    Id.
     1157–58. “If a rape victim can be an impartial juror in a rape prosecution,
    then surely [a] juror . . . whose experience was having been charged with
    -32-
    embezzlement and fraud and against whom the charges had been dismissed, could
    be an impartial juror for the trial of [a] weapons case.” Id. at 1158.
    And if a prior defendant for embezzlement and fraud could be an impartial
    juror for a weapons case, then we see no reason Juror Bays could not serve as an
    impartial juror for a murder case where his only undisclosed experience was eight
    years of service in the CIA (compared to over twenty years of experience in the
    Marine Corps, including exposure to court-martial proceedings, which Juror Bays
    did disclose during the voir dire). Moreover, Howell has not shown that Juror
    Bays answered any question dishonestly, only that Bays did not volunteer this
    extra information. Thus, Howell has failed to show juror bias justifying a
    challenge for cause, and—especially considering AEDPA deference to the
    OCCA’s decision to deny relief—this claim cannot succeed.
    Nor is Howell entitled to an evidentiary hearing for this claim. The district
    court denied Howell’s request for an evidentiary hearing on this issue because
    Howell had “done little more than allege possible bias.” Howell v. Mullin, No.
    CIV-99-1803-A, slip op. at 33 (W.D. Okla. Sept. 5, 2002). And the district
    court’s decision was not in error. Assuming Howell has diligently sought to
    develop the factual basis for this claim, he “is entitled to receive an evidentiary
    hearing so long as his allegations, if true and if not contravened by the existing
    factual record, would entitle him to habeas relief.” Miller v. Champion, 
    161 F.3d 1249
    , 1253 (10th Cir. 1998). But the record contravenes Howell’s allegation that
    -33-
    Juror Bays intentionally withheld his prior employment with the CIA, and, as
    explained above, that prior employment is not cause for challenge anyway. We
    cannot grant Howell an evidentiary hearing on this claim.
    Accordingly, we affirm the district court’s denial of relief on this ground.
    4. Testimony of Co-Defendant’s Former Attorneys
    a. Factual Background
    At their joint preliminary hearing, Watson testified that Howell shot
    Calhoun in order to steal Calhoun’s car. Howell was present and able to
    cross-examine Watson.
    At their joint trial, however, Watson recanted and claimed that, in fact,
    Howell shot Calhoun in self-defense. She explained that the prosecution had
    coerced her preliminary hearing testimony to the contrary. Again, Howell was
    present and able to cross-examine Watson.
    In response to Watson’s changed story, the prosecution called as rebuttal
    witnesses two attorneys who had been Watson’s counsel at the time of the
    preliminary hearing but were no longer representing her. The attorneys testified
    that Watson’s preliminary hearing testimony was “consistent” with what she had
    previously told them about the crimes, and that their conversations with her
    occurred before any contact with the district attorney—negating her claim of
    coercion. See Trial Tr., Vol. VI, at 215, 220–21. Further, they testified that they
    had accompanied her to meetings with the prosecution, and that the prosecutors
    -34-
    only ever asked Watson to tell the truth. As was the case with Watson, Howell
    was present and able to cross-examine the former attorneys. Watson was also
    available to re-take the stand if the defense chose to call her again.
    b. Legal Background
    Howell alleges that his Sixth Amendment right to confrontation was
    violated by the admission of the former attorneys’ testimony. As with Howell’s
    other Confrontation Clause claim, we cannot grant Howell relief based on
    Crawford v. Washington, 
    541 U.S. 36
     (2004), and its progeny. Howell may
    succeed with this Confrontation Clause claim only if, under pre-Crawford case
    law, the former attorneys’ testimony violated Howell’s Confrontation Clause
    rights. See Whorton v. Bockting, 
    549 U.S. 406
    , 409 (2007).
    Under pre-Crawford case law, “the Confrontation Clause is not violated by
    admitting a declarant’s out-of-court statements, as long as the declarant is
    testifying as a witness [at trial] and subject to full and effective cross-
    examination.” Green, 
    399 U.S. at 158
     (emphasis added). “The Constitution . . .
    is violated only where the out-of-court hearsay statement is that of a declarant
    who is unavailable at the trial for ‘full and effective’ cross-examination.” Nelson
    v. O’Neil, 
    402 U.S. 622
    , 626–27 (1971) (emphasis added).
    c. Standard of Review
    If the OCCA addressed this claim, as it did the others, we would be
    reviewing its determination under AEPDA deference. But Howell contends the
    -35-
    OCCA failed to address this claim, see Aplt. Br. at 41–42, and the State agrees,
    see Aple. Br. at 27–28. The district court concluded the same. Howell v. Mullin,
    No. CIV-99-1803-A, slip. op. at 20 (“It does not appear [Howell]’s claim was
    addressed directly by the OCCA.”). And because, according to the district court,
    Howell “raised this issue on direct appeal,” the court considered the claim to have
    been “exhausted in state court” and proceeded to review the claim on its merits.
    
    Id.
    But since the parties briefed this issue, the Supreme Court has clarified
    that, even when a state court does not explicitly address a claim, we must presume
    the court adjudicated the claim on its merits unless that presumption is rebutted.
    Johnson v. Williams, 
    133 S. Ct. 1088
    , 1091–92 (2013).
    And, in fact, it appears the state court did address this claim, at least in
    part. In Howell I, the OCCA states,
    In his proposition XII, [Howell] refers . . . to the
    testimony of Ms. Watson’s two former attorneys, who
    testified that Ms. Watson’s preliminary hearing
    testimony was consistent with her statements to them.
    [Howell] holds that under these circumstances, the trial
    court had an affirmative duty to instruct the jury sua
    sponte that this evidence could be used only for
    impeachment purposes and not for substantive purposes.
    We do not agree. . . . [T]he failure of a trial court to
    give a limiting instruction sua sponte does not
    automatically constitute reversible error. On the record
    before us, we cannot say that the failure of the trial court
    to give a limiting instruction sua sponte deprived
    -36-
    [Howell] of a substantial right rising to the level of plain
    error.
    Howell I, 
    882 P.2d at 1094
     (emphasis added). In sum, according to the OCCA,
    Howell was challenging the lack of a limiting instruction for the attorneys’
    testimony, and, without a proposed limiting instruction from Howell, the trial
    court did not plainly err in failing to offer its own. 7
    Because the OCCA decided whether the omission of a limiting instruction
    violated Howell’s rights, we review that decision under AEDPA. But what about
    the admission of the former attorneys’ testimony in the first place? The district
    court is correct that the OCCA did not mention whether or not admitting such
    evidence violated Howell’s Confrontation Clause rights, yet the Supreme Court
    has established a rebuttable presumption that the state court did decide the issue.
    In the end, we need not decide whether AEDPA deference applies, because
    even if it does not, we cannot grant Howell habeas relief on this claim. At trial,
    Howell did not object to the testimony of Watson’s former attorneys, so review of
    the trial court’s admission of this testimony would be for plain error under state
    or federal law. See United States v. Hinson, 
    585 F.3d 1328
    , 1335–38 (10th Cir.
    7
    Howell claims he proposed a limiting instruction, but the instruction he
    cites is not on point. His proposed instruction does not address whether the
    testimony could be used substantively or for impeachment purposes only. See
    O.R. (1989), Vol. II, at 551 (“a confession or admission may not be considered
    . . . against any defendant other than the person who made the confession or
    admission”).
    -37-
    2009); McGregor v. State, 
    885 P.2d 1366
    , 1375 (Okla. Crim. App. 1994). And
    under plain error review—let alone under AEDPA deference—this claim fails.
    d. Analysis
    We turn first to plain error review of whether admitting the former
    attorneys’ testimony violated Howell’s confrontation right. Then we address
    under AEDPA deference whether the trial court erred in omitting a limiting
    instruction.
    The relevant out-of-court statements admitted against Howell are Watson’s
    private conversations with her former attorneys and Watson’s testimony at the
    preliminary hearing. While testifying at Howell’s trial—under oath and subject to
    Howell’s cross-examination—Watson’s former attorneys said only that whatever
    Watson told them before her preliminary hearing was “consistent” with what she
    later said at the preliminary hearing. Trial Tr., Vol. VI, at 215, 220–21. The
    former attorneys never actually quoted Watson or even paraphrased what she had
    said. To the extent their testimony was still hearsay, 8 the out-of-court declarant
    was Watson. And Watson “testif[ied] as a witness” and was “subject to full and
    effective cross-examination” at her and Howell’s joint trial. 9 See Green, 
    399 U.S. 8
    Arguably, the testimony was not hearsay under the Oklahoma equivalent
    of Federal Rule of Evidence 801(d)(1)(B) for prior consistent statements. But we
    need not decide this question of state law. See Estelle v. McGuire, 
    502 U.S. 62
    ,
    67–68 (1991).
    9
    Howell and Watson were represented by separate counsel at the joint
    (continued...)
    -38-
    at 158. Moreover, as we mentioned above, her preliminary hearing testimony,
    like that in Green, “had already been given under circumstances closely
    approximating those that surround the typical trial.” 
    Id. at 165
    . Thus, under
    pre-Crawford precedent, there is no Confrontation Clause violation.
    To be sure, the former attorneys’ testimony may have violated Watson’s
    attorney-client privilege. On that basis, Watson’s trial counsel made an objection,
    which the judge overruled because he believed that Watson had waived the
    privilege. And it is true that Watson may in fact have waived her privilege when
    she testified about some of her communications with the former attorneys.
    9
    (...continued)
    trial, and Howell’s attorney cross-examined Watson after Watson took the stand
    in her own defense. Watson was therefore both legally unavailable and physically
    available to testify, an odd situation not apparently contemplated by either
    Roberts or Green. Two cases after Roberts relaxed the strict unavailability
    requirement, making Watson’s physical availability more important to the
    pre-Crawford Confrontation Clause analysis. See White v. Illinois, 
    502 U.S. 346
    ,
    357 (1992) (“We therefore see no basis in Roberts or Inadi for excluding from
    trial, under the aegis of the Confrontation Clause, evidence embraced within such
    exceptions to the hearsay rule as those for spontaneous declarations and
    statements made for medical treatment.”); United States v. Inadi, 
    475 U.S. 387
    ,
    400 (1986) (“[W]e continue to affirm the validity of the use of co-conspirator
    statements, and we decline to require a showing of the declarant’s unavailability
    as a prerequisite to their admission.”). Moreover, although Watson’s statements
    to her attorneys likely lacked the “indicia of reliability” required by Roberts, the
    state did not introduce those statements but rather elicited testimony about their
    “consistency” with the admissible statements she made in the pretrial hearing.
    The combination of Watson’s actual availability and the fact that her inadmissible
    statements were never introduced leads to the conclusion that Howell’s
    Confrontation Clause rights were not violated.
    -39-
    But we need not decide whether the privilege was violated, because
    “standing alone, the attorney-client privilege is merely a rule of evidence; it has
    not yet been held a constitutional right.” Partington v. Gedan, 
    961 F.2d 852
    , 863
    (9th Cir. 1992) (quoting Clutchette v. Rushen, 
    770 F.2d 1469
    , 1471 (9th Cir.
    1985), cert. denied, 
    475 U.S. 1088
     (1986)) (alteration incorporated; internal
    quotation marks omitted); see also Sanborn v. Parker, 
    629 F.3d 554
    , 575 (6th Cir.
    2010) (“a violation of the attorney-client privilege is not itself a ‘violation [] of
    the United States Constitution or its law and treaties’” (emphasis in original)).
    But see Note, The Attorney-Client Privilege: Fixed Rules, Balancing, and
    Constitutional Entitlement, 
    91 Harv. L. Rev. 464
    , 485 (1977) (“[W]hen the [F]ifth
    and [S]ixth [A]mendments are considered together, the individual accused of
    crime does seem to have a right to attorney-client privilege.”). “A violation of
    the attorney-client privilege implicates the Sixth Amendment right to counsel only
    . . . when the government interferes with the relationship between a criminal
    defendant and his attorney.” Partington, 
    961 F.2d at 863
     (emphasis added).
    Here, assuming no waiver, the only attorney-client privilege violated was
    that between Watson and her former counsel. The relationship with her trial
    counsel was unimpaired, so her Sixth Amendment right to counsel was not
    violated under plain error review. 10
    10
    We also need not decide whether Howell is able to bring a claim based
    (continued...)
    -40-
    Howell also argues that the Sixth Amendment requires a limiting
    instruction here. As discussed above, we review this claim under AEDPA
    deference. The OCCA concluded the lack of a limiting instruction did not plainly
    violate any substantive right. Howell disagrees, relying on the Supreme Court’s
    decision in Tennessee v. Street, 
    471 U.S. 409
     (1985). In Street, the Court noted
    that “[i]f the jury had been asked to infer that [the co-defendant’s] confession
    proved that [Street] participated in the murder, then the evidence would have been
    hearsay; and because [the co-defendant] was not available for cross-examination,
    Confrontation Clause concerns would have been implicated.” 
    Id. at 414
    (emphasis added). Here, by contrast, Watson was available for cross-
    examination, so even if hearsay had been elicited, there was no Confrontation
    Clause violation. And in any event, even if there were error, it was harmless
    since the evidence overwhelmingly supported the jury’s finding of Howell’s guilt.
    Hence, the OCCA’s resolution is not contrary to clearly established law, and we
    cannot disturb the decision.
    We affirm the district court’s denial of relief on this ground.
    10
    (...continued)
    on a privilege belonging to Watson, not him.
    -41-
    C. Second Penalty Phase Trial
    1. Ineffective Assistance of Counsel
    a. Factual Background
    According to Howell, his trial counsel made a “serious error” during the
    sentencing retrial in 1996: “Counsel called as a witness for Mr. Howell his prison
    case manager to inform the jury about Mr. Howell’s good conduct in prison. . . .
    The witness did not mention ‘death row,’ but counsel did. Several times.” Aplt.
    Br. at 47 (emphasis in original).
    b. Legal Background
    To make out an IAC claim under Strickland v. Washington, 
    466 U.S. 668
    (1984), Howell must show both (1) that his counsel provided deficient assistance
    and (2) that there was prejudice as a result. “To establish deficient performance,
    [Howell] must show . . . that counsel made errors so serious that counsel was not
    functioning as the ‘counsel’ guaranteed [Howell] by the Sixth Amendment.”
    Richter, 
    131 S. Ct. at 787
     (internal quotation marks omitted). To establish
    prejudice, Howell “must demonstrate a reasonable probability that, but for
    counsel’s unprofessional errors, the result of the proceeding would have been
    different.” 
    Id.
     (internal quotation marks omitted).
    “Surmounting Strickland’s high bar is never an easy task.” 
    Id. at 788
    (internal quotation marks omitted). “Even under de novo review, the standard for
    judging counsel’s representation is a most deferential one.” 
    Id.
     “Establishing
    -42-
    that a state court’s application of Strickland was unreasonable under § 2254(d) is
    all the more difficult. The standards created by Strickland and § 2254(d) are both
    highly deferential, and when the two apply in tandem, review is doubly so.” Id.
    (citations and internal quotation marks omitted).
    c. OCCA’s Decision
    The OCCA rejected this IAC claim, reasoning, “[I]t was counsel’s strategy
    to show that [Howell] had been a model prisoner while on death row, thereby
    rebutting the continuing[-]threat aggravating circumstance. Evidence was
    presented that [Howell] had not been in solitary confinement twenty-four hours a
    day, but had been outside of his cell with other prisoners. This Court will not
    second guess trial strategy.” Howell II, 
    967 P.2d at 1226
    .
    d. Analysis
    Under our “doubly” deferential standard of review, Howell’s claim cannot
    prevail. First, Howell argues that “telling the jury that a different, prior jury, had
    sentenced someone to death is a terrible mistake, predisposing the instant jury to
    follow the earlier jury’s recommendation.” Aplt. Br. at 47. But he cites no
    clearly established law saying as much, nor can we find any. Therefore, under
    AEDPA deference, we cannot overturn the OCCA’s decision.
    Admittedly, Howell’s counsel could have demonstrated Howell’s good
    behavior in prison without mentioning death row specifically. But that mistake
    alone is not enough to overcome Strickland and AEDPA deference. And in fact,
    -43-
    “evidence of a prior death sentence may not produce a unidirectional bias toward
    death.” Romano v. Oklahoma, 
    512 U.S. 1
    , 20 (1994) (Ginsburg, J., dissenting).
    Here, because the jurors were being asked to give Howell a new sentence, they
    could have deduced that the prior sentence was handed down in error—i.e., it was
    wrong. So when they learned from defense counsel that Howell’s first sentence
    was death (implied from Howell being on death row), that revelation could have
    weighed against giving Howell a death sentence again.
    Second, Howell argues that by informing the jury of his presence on death
    row, his counsel relieved the jury from making a new, independent, reasoned
    moral judgment about whether Howell should live or die, thereby violating
    Caldwell v. Mississippi, 
    472 U.S. 320
     (1985).
    The district court correctly rejected this argument—the OCCA’s decision
    did not violate the holding in Caldwell. “To establish a Caldwell violation,
    [Howell] necessarily must show that the remarks to the jury improperly described
    the role assigned to the jury by local law.” Dugger v. Adams, 
    489 U.S. 401
    , 407
    (1989). Following its review of the record, the district court noted that “no
    statements or insinuations were made that anyone other than the jury had the duty
    and responsibility to determine [Howell’s] sentence,” so no attorney committed a
    Caldwell violation. Howell v. Mullin, No. CIV-99-1803-A, slip op. at 48. Howell
    does not demonstrate otherwise. His sole allegation—that counsel told the jury
    Howell was on death row—is not an “improper[] descri[ption] [of] the role
    -44-
    assigned to the jury.” In fact, it is not a reference to the jury’s role at all, and for
    that reason alone, this argument fails.
    Accordingly, we affirm the district court’s denial of relief on this ground.
    D. Motion To Reconsider COA Request
    Having found no ground to grant federal habeas relief from either the guilt
    phase or second penalty phase, we turn to the alleged errors in Howell’s trial on
    mental retardation. Because the district court denied a COA, we cannot review
    Howell’s claims on their merits unless we first grant Howell a COA. We have
    already denied his request for a COA, but he timely moved for our
    reconsideration. He asked us to grant COA on four issues: (1) the applicable
    burden of proof in Atkins proceedings; (2) prosecutorial misconduct at jury
    selection; (3) ineffective assistance of counsel; and (4) insufficient evidence to
    support the jury’s mental retardation finding.
    We grant a COA only if an applicant makes a “substantial showing of the
    denial of a constitutional right.” 
    28 U.S.C. § 2253
    (c)(2). An applicant must
    show “that reasonable jurists could debate whether . . . the petition should have
    been resolved in a different manner or that the issues presented were adequate to
    deserve encouragement to proceed further.” United States v. Taylor, 
    454 F.3d 1075
    , 1078 (10th Cir. 2006) (internal quotation marks omitted).
    Howell’s claims already have been adjudicated on the merits in state court,
    so he can obtain federal habeas relief only if he can overcome AEDPA deference
    -45-
    —i.e., only if he can establish that the state court’s decision was either (1)
    contrary to or involved an unreasonable application of “clearly established
    Federal law,” or (2) was based upon an unreasonable determination of the facts in
    light of the evidence presented at trial. 
    28 U.S.C. § 2254
    (d). Thus, the decision
    whether to grant Howell’s COA request rests on whether “reasonable jurists
    would find the district court’s assessment of the constitutional claims debatable or
    wrong” in light of the deference owed to the OCCA’s adjudication of Howell’s
    claims. Miller-El v. Cockrell, 
    537 U.S. 322
    , 338 (2003); see also 
    id. at 336
     (“We
    look to the District Court’s application of AEDPA to petitioner’s constitutional
    claims and ask whether that resolution was debatable amongst jurists of reason.”).
    Based on these principles, we find no persuasive reason to reconsider our
    previous decision denying COA.
    1. Burden of Proof
    Howell first claims the Supreme Court’s decisions in Apprendi v. New
    Jersey, 
    530 U.S. 466
     (2000), and Ring v. Arizona, 
    536 U.S. 584
     (2002), require
    the prosecution to bear the burden of proving Howell is not mentally retarded.
    After analyzing both Supreme Court cases, the OCCA disagreed and denied this
    claim. The district court concluded the OCCA’s interpretation and application of
    Apprendi and Ring were reasonable and therefore entitled to AEDPA deference.
    Consequently, the district court denied this ground for relief.
    -46-
    The district court’s decision is not debatable—Howell cannot overcome
    AEDPA deference. In Apprendi, the Supreme Court held that any fact (other than
    prior conviction) that increases the maximum penalty for a crime must be
    submitted to a jury and proven beyond a reasonable doubt. Apprendi, 
    530 U.S. at 476
    . In Ring, the Supreme Court extended Apprendi to capital defendants,
    thereby requiring prosecutors to prove beyond a reasonable doubt statutory
    aggravating circumstances to impose the death penalty. See Ring, 
    536 U.S. at 589
    . Neither holding applies directly to the circumstances of our case, so under
    AEDPA deference, the OCCA’s decision cannot be challenged.
    Nevertheless, Howell argues this question “remains open and debatable,”
    and therefore a proper ground for a COA. Aplt. COA Br. at 33. But the problem
    for Howell is that this question’s lack of firm resolution precludes any relief,
    given that the OCCA has already taken a reasonable position. The OCCA’s
    determination here is not contrary to a Supreme Court holding, so none could
    debate the district court’s decision that AEDPA deference precludes relief.
    Moreover, we have already held that Oklahoma law on this burden-of-proof
    question was not contrary to Supreme Court precedent. See Ochoa v. Workman,
    
    669 F.3d 1130
    , 1133 n.1 (10th Cir. 2012). And other courts agree. See, e.g.,
    United States v. Webster, 
    421 F.3d 308
    , 311–12 (5th Cir. 2005) (rejecting that
    Apprendi and Ring require placing the burden on the prosecution to prove beyond
    a reasonable doubt that a defendant is not mentally retarded); State v. Were, 890
    -47-
    N.E.2d 263, 478–79 (Ohio 2008) (same, and listing other state courts of accord,
    including those of Arizona, Georgia, Indiana, Kentucky, Mississippi, and
    Pennsylvania); supra Part II.F. (listing still other state courts holding the same,
    including those of Louisiana, New Jersey, New Mexico, New York, South
    Carolina, Tennessee, Texas, and Virginia); see also Bowling v. Commonwealth,
    
    163 S.W.3d 361
    , 381–82 (Ky. 2005) (“Every state statute providing a mental
    retardation exemption from the death penalty places the burden on the defendant
    to prove that he is mentally retarded, as has every court that has addressed the
    issue, usually in the context of holding that the absence of mental retardation is
    not an element of the offense.” (footnotes omitted)).
    Accordingly, we deny Howell’s request for a COA on this issue. 11
    2. Prosecutorial Misconduct
    Howell claims the prosecution used two peremptory challenges on the basis
    of race, thereby violating the Supreme Court’s decision in Batson v. Kentucky,
    
    476 U.S. 79
     (1986). Reviewing for plain error (since Howell did not raise a
    11
    Howell also argues that “[b]ecause a finding of retardation precludes the
    death sentence, the absence of retardation is a necessary finding for imposition of
    death within the meaning of Ring.” Aplt. COA Br. at 34. But that logic does not
    mandate placing the burden of proof on the prosecution. Just because finding a
    defendant incompetent to stand trial precludes sentencing him to death does not
    mean the prosecution must prove a defendant’s competence. See Medina v.
    California, 
    505 U.S. 437
    , 449–51 (1992). It is the same with mental retardation.
    Until the Supreme Court holds otherwise, no reasonable jurist could debate the
    district court’s decision to deny relief.
    -48-
    Batson objection at trial), the OCCA found no merit to this claim, concluding
    Howell failed to show that the prosecutor lacked a race-neutral explanation for
    the two strikes in question. Thus, Howell would have to overcome AEDPA
    deference if granted a COA.
    The district court also rejected this claim, but for a different reason.
    According to the district court, Howell failed to make a prima facie case that the
    two jurors were removed due to their race. It explained, “the race of these jurors
    is not borne out by the record.” Howell v. Workman, No. CIV-07-1008-D, 
    2011 WL 5143069
    , at *24 (W.D. Okla. Oct. 28, 2011). For that reason, the district
    court concluded Howell failed to meet his burden under step one of Batson, and it
    dismissed the claim accordingly.
    Batson provides
    a three-step process for a trial court to use in
    adjudicating a claim that a peremptory challenge was
    based on race:
    First, a defendant must make a prima facie showing that
    a peremptory challenge has been exercised on the basis
    of race; second, if that showing has been made, the
    prosecution must offer a race-neutral basis for striking
    the juror in question; and third, in light of the parties’
    submissions, the trial court must determine whether the
    defendant has shown purposeful discrimination.
    Snyder v. Louisiana, 
    552 U.S. 472
    , 476–77 (2008) (alterations incorporated)
    (citations and internal quotation marks omitted).
    -49-
    The district court’s decision to reject this claim is not “debatable or
    wrong.” As the district court explained, nowhere in the record is there any
    reference to a juror’s race. Howell does not point to one, and we cannot find one.
    Nor has Howell attempted to supplement the record with an affidavit from any
    juror or other person present at trial to establish a juror’s race. And in the
    alternative, the record amply supports the State’s contention that the prosecutor
    had race-neutral reasons for excusing the jurors—namely, their experiences with
    mentally disabled people in their personal lives.
    The district court also denied Howell’s motion for an evidentiary hearing as
    untimely, and that decision also is not open to debate. After granting several
    extensions, the court gave Howell until April 7, 2008, to file an additional
    motion. But Howell did not submit his motion for an evidentiary hearing until
    July 2009—fifteen months after the deadline. And Howell offered no reason for
    the untimeliness of his motion. No reasonable jurist could debate whether this
    issue should have been resolved differently. See Slack, 
    529 U.S. at 484
     (“Where
    a plain procedural bar is present and the district court is correct to invoke it to
    dispose of the case, a reasonable jurist could not conclude either that the district
    court erred in dismissing the petition or that the petitioner should be allowed to
    proceed further. In such a circumstance, no appeal would be warranted.”).
    -50-
    Accordingly, we deny Howell’s request for a COA on this ground. 12
    3. Ineffective Assistance of Counsel
    Howell raised three claims of ineffective assistance at his Atkins trial: (1)
    trial counsel’s failure to object to the alleged Batson violations, (2) his failure to
    exclude the state mental health expert’s testimony, and (3) his failure to present
    an additional witness to show that Howell was in special education classes as a
    youth. The OCCA denied all three IAC claims, so Howell would have to
    overcome AEDPA deference if we granted a COA. And under AEDPA deference,
    the OCCA violated no clearly established federal law in denying relief for
    Howell’s IAC claims because Howell is unable to show prejudice from any of
    these alleged mistakes. Accordingly, no reasonable jurist could disagree with the
    district court’s decision to deny relief for these claims as well.
    We turn first to defense counsel’s failure to object to the alleged Batson
    violations. Because Howell has not shown any Batson violations, he cannot show
    counsel erred in failing to object. Thus, he is not entitled to habeas relief.
    12
    We agree with Howell that the OCCA misstated clearly established law
    when it said Howell bore the burden of showing the prosecution lacked a race-
    neutral explanation for the strikes. As Howell correctly notes, the prosecution
    bears that burden. See Snyder, 
    552 U.S. at 477
    . But we do not get to the
    prosecution’s burden of providing a race-neutral explanation—step two of a
    Batson claim—unless Howell first gets us past step one. See, e.g., 
    id.
     at 477–78.
    And as the district court concluded, Howell has not made the requisite prima facie
    case. No reasonable jurist could debate that conclusion.
    -51-
    The other two IAC claims merit additional discussion. Howell argues that
    his counsel was constitutionally ineffective for failing to challenge or exclude Dr.
    Hutson (the State mental health expert)’s conclusions. And he claims his counsel
    was constitutionally ineffective for failing to present at trial the testimony of a
    former high school teacher who says she taught Howell and his brother in a
    special education class in high school.
    The OCCA rejected Howell’s first claim for lack of prejudice because
    “[b]oth experts used their professional knowledge and experience to ‘estimate’
    what they believed [Howell’s] true IQ to be,” and “both experts used a wide array
    of information, well beyond raw IQ scores, to arrive at their respective
    conclusions about [Howell’s] mental abilities.” Howell IV, No. PCD-2006-712,
    slip op. at 9, 11. More, both experts were exposed to vigorous and effective
    examination regarding their testimony, further mitigating any potential prejudice.
    Given AEDPA deference to the OCCA—not to mention the plethora of evidence
    supporting the OCCA’s and jury’s conclusions—the district court’s decision to
    deny relief for this IAC claim is not open to debate.
    The OCCA rejected Howell’s other IAC claim because, even if the high
    school teacher had testified at Howell’s Oklahoma trial, a reasonable jury could
    have concluded that Howell failed to prove by a preponderance of evidence that
    he manifested mental retardation before the age of eighteen. In light of AEDPA
    deference, the district court denied relief.
    -52-
    No reasonable jurist could debate this decision, either. Howell’s brother
    testified at the Atkins trial, and he said—as the teacher also would have said—that
    Howell was in special education classes in high school. But the school records
    belied that claim: Howell’s brother and sister were both listed in special
    education, while Howell was not. Having one more voice (the teacher’s) saying
    that Howell was in fact in a special education class could have helped Howell’s
    case, but it is not enough to show prejudice given the deference owed to the
    OCCA’s decision to deny relief. Besides, IQ tests administered to Howell when
    he was younger showed an IQ closer to 80, not one below 70. In sum, the district
    court’s decision is not open to debate.
    Accordingly, we deny Howell’s request for a COA on his IAC claims.
    4. Sufficiency of the Evidence
    Howell also challenges the sufficiency of the evidence at the Atkins trial.
    He faces an uphill battle to show the district court’s assessment of this issue was
    “debatable or wrong.” As the district court correctly noted, “[r]eview of this
    claim requires layers of deference.” Howell v. Workman, 
    2011 WL 5143069
    , at
    *5. First, AEDPA deference applies to the OCCA’s review—and rejection—of
    this claim. Thus, the OCCA’s factual determinations are presumed correct absent
    clear and convincing evidence to the contrary. See 
    28 U.S.C. § 2254
    (e)(1).
    Second, a jury concluded Howell was not mentally retarded, and our review of
    jury verdicts is “‘sharply limited.’” Boltz v. Mullin, 
    415 F.3d 1215
    , 1232 (10th
    -53-
    Cir. 2005). We cannot overturn a jury verdict “as long as it is within the bounds
    of reason.” 
    Id.
     Given these layers of deference, Howell would have to present a
    very convincing case that he is, in fact, mentally retarded—i.e., that the OCCA’s
    and Oklahoma jury’s decisions to the contrary were unreasonable—in order to
    show that the district court’s assessment of this claim was “debatable or wrong.”
    Howell falls far short of meeting that standard. First, he argues that Atkins
    requires a level of scientific certainty that the Oklahoma trial court fell below.
    But as the district court correctly noted, under Atkins, the states have “the task of
    developing appropriate ways to enforce the constitutional restriction [against
    executing the mentally retarded].” 536 U.S. at 317 (internal quotation marks
    omitted). The Atkins Court did not mandate any particular methodologies for
    determining mental retardation, instead leaving that question to the states. The
    district court’s rejection of this argument is not open to reasonable debate.
    Second, Howell argues that the OCCA’s decision to affirm the jury’s
    verdict was an unreasonable determination of the facts and thus should be
    overturned on federal habeas. But the district court disagreed, finding that,
    contrary to Howell’s claims, “the evidence presented was not conclusive but
    disputed.” Howell v. Workman, 
    2011 WL 5143069
    , at *8. And under AEDPA
    deference and the deference owed to jury verdicts, no reasonable jurist could
    debate the district court’s conclusion. See Jackson v. Virginia, 
    443 U.S. 307
    ,
    318–19 (1979).
    -54-
    Accordingly, we deny Howell’s request for a COA on this ground.
    5. Other Errors
    For his last ground, Howell incorporates by reference briefing and
    arguments for “all remaining issues not already briefed in this application,
    including Claims 1, 3, 4, 5, 6, 7, 8, 9, 13, 14, 18, and 19.” Aplt. COA Br. at 34.
    But “incorporation by reference is not permitted in appellate materials in this
    circuit.” Young v. Addison, 490 F. App’x 960, 964 (10th Cir. 2012) (citing 10th
    Cir. R. 28.4). “Thus we should not consider arguments [Howell] made in state
    and district court that he attempts to incorporate into his appellate brief.” Id.; see
    also Gaines-Tabb v. ICI Explosives, USA, Inc., 
    160 F.3d 613
    , 624 (10th Cir.
    1998) (“arguments not set forth fully in the opening brief are waived”); cf. Fed.
    R. App. P. 28(a)(9)(A) (“The appellant’s brief must contain . . . the argument,
    which must contain: appellant’s contentions and the reasons for them . . . .”).
    Accordingly, these arguments will not be addressed, and we deny Howell’s
    request for a COA on these claims.
    IV. Conclusion
    For the foregoing reasons, we AFFIRM the district court’s denial of habeas
    relief for Howell’s conviction and sentence, and we DENY Howell’s motion to
    reconsider our denial of a COA on issues arising from his Atkins trial in case
    number 12-6014 and DISMISS that appeal.
    -55-