Brumfield v. Cain ( 2015 )


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  • (Slip Opinion)              OCTOBER TERM, 2014                                       1
    Syllabus
    NOTE: Where it is feasible, a syllabus (headnote) will be released, as is
    being done in connection with this case, at the time the opinion is issued.
    The syllabus constitutes no part of the opinion of the Court but has been
    prepared by the Reporter of Decisions for the convenience of the reader.
    See United States v. Detroit Timber & Lumber Co., 
    200 U.S. 321
    , 337.
    SUPREME COURT OF THE UNITED STATES
    Syllabus
    BRUMFIELD v. CAIN, WARDEN
    CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR
    THE FIFTH CIRCUIT
    No. 13–1433. Argued March 30, 2015 —Decided June 18, 2015
    Petitioner Kevan Brumfield was convicted of murder in a Louisiana
    court and sentenced to death before this Court held that the Eighth
    Amendment prohibits execution of the intellectually disabled, Atkins
    v. Virginia, 
    536 U.S. 304
    . Implementing Atkins’ mandate, see 
    id., at 317,
    the Louisiana Supreme Court determined that an evidentiary
    hearing is required when a defendant “provide[s] objective factors”
    sufficient to raise a “ ‘a reasonable ground’ ” to believe that he has an
    intellectual disability, which the court defined as “(1) subaverage in-
    telligence, as measured by objective standardized IQ tests; (2) signifi-
    cant impairment in several areas of adaptive skills; and (3) manifes-
    tations of this neuro-psychological disorder in the developmental
    stage.” State v. Williams, 2001–1650 (La. 11/1/02), 
    831 So. 2d 835
    ,
    857, 861, 854.
    Soon after the Williams decision, Brumfield amended his pending
    state postconviction petition to raise an Atkins claim. Seeking an ev-
    identiary hearing, he pointed to evidence introduced at sentencing
    that he had an IQ of 75, had a fourth-grade reading level, had been
    prescribed numerous medications and treated at psychiatric hospitals
    as a child, had been identified as having a learning disability, and
    had been placed in special education classes. The trial court dis-
    missed Brumfield’s petition without holding a hearing or granting
    funds to conduct additional investigation. Brumfield subsequently
    sought federal habeas relief. The District Court found that the state
    court’s rejection of Brumfield’s claim was both “contrary to, or in-
    volved an unreasonable application of clearly established Federal
    law, as determined by” this Court and “based on an unreasonable de-
    termination of the facts in light of the evidence presented in the State
    court proceeding.” 
    28 U.S. C
    . §§2254(d)(1), (2). The court went on to
    2                        BRUMFIELD v. CAIN
    Syllabus
    determine that Brumfield was intellectually disabled. The Fifth Cir-
    cuit found that Brumfield’s petition failed to satisfy either of
    §2254(d)’s requirements and reversed.
    Held: Because Brumfield satisfied §2254(d)(2)’s requirements, he was
    entitled to have his Atkins claim considered on the merits in federal
    court. Pp. 6–19.
    (a) The two underlying factual determinations on which the state
    trial court’s decision was premised—that Brumfield’s IQ score was
    inconsistent with a diagnosis of intellectual disability and that he
    presented no evidence of adaptive impairment—were unreasonable
    under §2254(d)(2). Because that standard is satisfied, the Court need
    not address §2254(d)(1). Pp. 6–17.
    (1) Expert trial testimony that Brumfield scored a 75 on an IQ
    test is entirely consistent with intellectual disability. Every IQ score
    has a margin of error. Accounting for that margin of error, the
    sources on which the Williams court relied in defining subaverage in-
    telligence describe a score of 75 as consistent with an intellectual dis-
    ability diagnosis. There was no evidence presented to the trial court
    of any other IQ test that was sufficiently rigorous to preclude the
    possibility that Brumfield possessed subaverage intelligence. Pp. 8–
    11.
    (2) The state-court record contains sufficient evidence to suggest
    that Brumfield would meet the criteria for adaptive impairment.
    Under the test most favorable to the State, an individual like Brum-
    field must show a “substantial functional limitation” in three of six
    “areas of major life activity.” 
    Williams, 831 So. 2d, at 854
    . Brum-
    field—who was placed in special education classes at an early age,
    was suspected of having a learning disability, and can barely read at
    a fourth-grade level—would seem to be deficient in two of those are-
    as: “[u]nderstanding and use of language” and “[l]earning.” 
    Ibid. His low birth
    weight, his commitment to mental health facilities at a
    young age, and officials’ administration of antipsychotic and sedative
    drugs to him at that time all indicate that he may well have had sig-
    nificant deficits in at least one of the remaining four areas. In light
    of that evidence, the fact that the record contains some contrary evi-
    dence cannot be said to foreclose all reasonable doubt as to his intel-
    lectual disability. And given that Brumfield’s trial occurred before
    Atkins, the trial court should have taken into account that the evi-
    dence before it was sought and introduced at a time when Brum-
    field’s intellectual disability was not at issue. Pp. 11–17.
    (b) The State’s two additional arguments are rejected. Because the
    State did not press below the theory that §2254(e)(1) supplies the
    governing standard when evaluating whether a habeas petitioner has
    satisfied §2254(d)(2)’s requirements, that issue is not addressed here.
    Cite as: 576 U. S. ____ (2015)                   3
    Syllabus
    And because the state trial court made no finding that Brumfield had
    failed to produce evidence suggesting he could meet the “manifesta-
    tions . . . in the developmental stage” requirement for intellectual
    disability, there is no determination on that point to which a federal
    court must defer in assessing whether Brumfield satisfied §2254(d).
    In any event, the state court record contained ample evidence creat-
    ing a reasonable doubt as to whether Brumfield’s disability manifest-
    ed before adulthood. Pp. 17–18.
    
    744 F.3d 918
    , vacated and remanded.
    SOTOMAYOR, J., delivered the opinion of the Court, in which KENNE-
    DY,GINSBURG, BREYER, and KAGAN, JJ., joined. THOMAS, J., filed a dis-
    senting opinion, in all but Part I–C of which ROBERTS, C. J., and SCALIA
    and ALITO, JJ., joined. ALITO, J., filed a dissenting opinion, in which
    ROBERTS, C. J., joined.
    Cite as: 576 U. S. ____ (2015)                              1
    Opinion of the Court
    NOTICE: This opinion is subject to formal revision before publication in the
    preliminary print of the United States Reports. Readers are requested to
    notify the Reporter of Decisions, Supreme Court of the United States, Wash-
    ington, D. C. 20543, of any typographical or other formal errors, in order
    that corrections may be made before the preliminary print goes to press.
    SUPREME COURT OF THE UNITED STATES
    _________________
    No. 13–1433
    _________________
    KEVAN BRUMFIELD, PETITIONER v.
    BURL CAIN, WARDEN
    ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 18, 2015]
    JUSTICE SOTOMAYOR delivered the opinion of the Court.
    In Atkins v. Virginia, 
    536 U.S. 304
    (2002), this Court
    recognized that the execution of the intellectually disabled
    contravenes the Eighth Amendment’s prohibition on cruel
    and unusual punishment. After Atkins was decided,
    petitioner, a Louisiana death-row inmate, requested an
    opportunity to prove he was intellectually disabled in state
    court. Without affording him an evidentiary hearing or
    granting him time or funding to secure expert evidence,
    the state court rejected petitioner’s claim. That decision,
    we hold, was “based on an unreasonable determination of
    the facts in light of the evidence presented in the State
    court proceeding.” 
    28 U.S. C
    . §2254(d)(2). Petitioner was
    therefore entitled to have his Atkins claim considered on
    the merits in federal court.
    I
    Petitioner Kevan Brumfield was sentenced to death for
    the 1993 murder of off-duty Baton Rouge police officer
    Betty Smothers. Brumfield, accompanied by another
    individual, shot and killed Officer Smothers while she was
    escorting the manager of a grocery store to the bank.
    2                        BRUMFIELD v. CAIN
    Opinion of the Court
    At the time of Brumfield’s trial, this Court’s precedent
    permitted the imposition of the death penalty on intellec-
    tually disabled persons. See Penry v. Lynaugh, 
    492 U.S. 302
    , 340 (1989) (opinion of O’Connor, J.). But in Atkins,
    this Court subsequently held that “in light of . . . ‘evolving
    standards of decency,’ ” the Eighth Amendment “ ‘places a
    substantive restriction on the State’s power to take the
    life’ of a mentally retarded 
    offender.” 536 U.S., at 321
    (quoting Ford v. Wainwright, 
    477 U.S. 399
    , 405 (1986)).1
    Acknowledging the “disagreement” regarding how to
    “determin[e] which offenders are in fact” intellectually
    disabled, the Court left “to the State[s] the task of develop-
    ing appropriate ways to enforce the constitutional re-
    striction upon [their] execution of 
    sentences.” 536 U.S., at 317
    (internal quotation marks omitted; some alterations in
    original).
    The Louisiana Supreme Court took up the charge of
    implementing Atkins’ mandate in State v. Williams, 2001–
    1650 (La. 11/1/02), 
    831 So. 2d 835
    . The court held that “a
    diagnosis of mental retardation has three distinct compo-
    nents: (1) subaverage intelligence, as measured by objec-
    tive standardized IQ tests; (2) significant impairment in
    several areas of adaptive skills; and (3) manifestations of
    this neuro-psychological disorder in the developmental
    stage.” 
    Id., at 854
    (relying on, inter alia, American Asso-
    ciation of Mental Retardation, Mental Retardation: Defini-
    tion, Classification, and Systems of Supports (10th ed.
    2002) (AAMR), and American Psychiatric Association,
    Diagnostic and Statistical Manual of Mental Disorders
    (rev. 4th ed. 2000) (DSM–IV)); see also La. Code Crim.
    Proc. Ann., Art. 905.5.1(H)(1) (West Cum. Supp. 2015)
    (subsequently enacted statute governing Atkins claims
    ——————
    1 While this Court formerly employed the phrase “mentally retarded,”
    we now “us[e] the term ‘intellectual disability’ to describe the identical
    phenomenon.” Hall v. Florida, 572 U. S. ___, ___ (2014) (slip op., at 2).
    Cite as: 576 U. S. ____ (2015)                   3
    Opinion of the Court
    adopting the three Williams criteria). The Williams court
    also clarified that “not everyone faced with a death pen-
    alty sentence” would “automatically be entitled to a post-
    Atkins hearing”; rather, it would “be an individual defend-
    ant’s burden to provide objective factors that will put at
    issue the fact of mental 
    retardation.” 831 So. 2d, at 857
    .
    Borrowing from the state statutory standard for determin-
    ing when a pretrial competency inquiry is necessary, the
    court held that an Atkins evidentiary hearing is required
    when an inmate has put forward sufficient evidence to
    raise a “ ‘reasonable ground’ ” to believe him to be intellec-
    tually disabled. See 
    id., at 861;
    see also 
    id., at 858,
    n. 33
    (characterizing the requisite showing as one raising a
    “ ‘reasonable doubt’ ”).2
    Shortly after the Williams decision, Brumfield amended
    his pending state postconviction petition to raise an Atkins
    claim. He sought an evidentiary hearing on the issue,
    asserting that his case was “accompanied by a host of
    objective facts which raise the issue of mental retarda-
    tion.” App. 203a.
    In support, Brumfield pointed to mitigation evidence
    introduced at the sentencing phase of his trial. He focused
    on the testimony of three witnesses in particular: his
    mother; Dr. Cecile Guin, a social worker who had compiled
    a history of Brumfield by consulting available records and
    conducting interviews with family members and teachers;
    and Dr. John Bolter, a clinical neuropsychologist who had
    performed a number of cognitive tests on Brumfield. A
    ——————
    2 Although   Louisiana subsequently adopted a statute governing the
    adjudication of Atkins claims, see La. Code Crim. Proc. Ann., Art.
    905.5.1 (West Cum. Supp. 2015), the parties agree that the procedures
    set forth in Williams governed this case. See Brief for Petitioner 26,
    n. 7; Brief for Respondent 13, n. 6; see also State v. Dunn, 2007–0878
    (La. 1/25/08), 
    974 So. 2d 658
    , 662 (holding that this statute does not
    “establis[ h] a procedure to be used for Atkins hearings conducted post-
    trial and/or post-sentencing”).
    4                   BRUMFIELD v. CAIN
    Opinion of the Court
    psychologist, Dr. Brian Jordan, had also examined Brum-
    field and prepared a report, but did not testify at trial.
    Brumfield contended that this evidence showed, among
    other things, that he had registered an IQ score of 75, had
    a fourth-grade reading level, had been prescribed numer-
    ous medications and treated at psychiatric hospitals as a
    child, had been identified as having some form of learning
    disability, and had been placed in special education classes.
    See 
    id., at 203a–204a.
    Brumfield further requested “all
    the resources necessary to the proper presentation of his
    case,” asserting that until he was able to “retain the ser-
    vices of various experts,” it would be “premature for [the
    court] to address [his] claims.” 
    Id., at 207a.
       Without holding an evidentiary hearing or granting
    funds to conduct additional investigation, the state trial
    court dismissed Brumfield’s petition. With respect to the
    request for an Atkins hearing, the court stated:
    “I’ve looked at the application, the response, the rec-
    ord, portions of the transcript on that issue, and the
    evidence presented, including Dr. Bolter’s testimony,
    Dr. Guinn’s [sic] testimony, which refers to and dis-
    cusses Dr. Jordan’s report, and based on those, since
    this issue—there was a lot of testimony by all of those
    in Dr. Jordan’s report.
    “Dr. Bolter in particular found he had an IQ of
    over—or 75. Dr. Jordan actually came up with a little
    bit higher IQ. I do not think that the defendant has
    demonstrated impairment based on the record in
    adaptive skills. The doctor testified that he did have
    an anti-social personality or sociopath, and explained
    it as someone with no conscience, and the defendant
    hadn’t carried his burden placing the claim of mental
    retardation at issue. Therefore, I find he is not enti-
    tled to that hearing based on all of those things that I
    just set out.” App. to Pet. for Cert. 171a–172a.
    Cite as: 576 U. S. ____ (2015)            5
    Opinion of the Court
    After the Louisiana Supreme Court summarily denied
    his application for a supervisory writ to review the trial
    court’s ruling, Brumfield v. State, 2004–0081 (La.
    10/29/04), 
    885 So. 2d 580
    , Brumfield filed a petition for
    habeas corpus in federal court, again pressing his Atkins
    claim. Pursuant to the Antiterrorism and Effective Death
    Penalty Act of 1996 (AEDPA), Brumfield could secure
    relief only if the state court’s rejection of his claim was
    either “contrary to, or involved an unreasonable applica-
    tion of, clearly established Federal law, as determined by
    the Supreme Court of the United States,” or was “based on
    an unreasonable determination of the facts in light of the
    evidence presented in the State court proceeding.” 
    28 U.S. C
    . §§2254(d)(1), (2).
    The District Court found that both of these require-
    ments had been met. 
    854 F. Supp. 2d 366
    , 383–384 (MD
    La. 2012). First, the District Court held that denying
    Brumfield an evidentiary hearing without first granting
    him funding to develop his Atkins claim “represented an
    unreasonable application of then-existing due process
    law,” thus satisfying §2254(d)(1). 
    Id., at 379.
    Second, and
    in the alternative, the District Court found that the state
    court’s decision denying Brumfield a hearing “suffered
    from an unreasonable determination of the facts in light of
    the evidence presented in the state habeas proceeding in
    violation of §2254(d)(2).” 
    Ibid. The District Court
    further determined Brumfield to be
    intellectually disabled based on the extensive evidence it
    received during an evidentiary hearing. 
    Id., at 406;
    see
    Cullen v. Pinholster, 
    563 U.S. 170
    , ___ (2011) (slip op., at
    13) (recognizing that federal habeas courts may “take new
    evidence in an evidentiary hearing” when §2254(d) does
    not bar relief). This evidence included the results of vari-
    ous IQ tests—which, when adjusted to account for meas-
    urement errors, indicated that Brumfield had an IQ score
    between 65 and 
    70, 854 F. Supp. 2d, at 392
    —testimony
    6                    BRUMFIELD v. CAIN
    Opinion of the Court
    and expert reports regarding Brumfield’s adaptive behav-
    ior and “significantly limited conceptual skills,” 
    id., at 401,
    and proof that these deficits in intellectual functioning
    had exhibited themselves before Brumfield reached adult-
    hood, 
    id., at 405.
    Thus, the District Court held, Brumfield
    had “demonstrated he is mentally retarded as defined by
    Louisiana law” and was “ineligible for execution.” 
    Id., at 406.
       The United States Court of Appeals for the Fifth Circuit
    reversed. 
    744 F.3d 918
    , 927 (2014). It held that Brum-
    field’s federal habeas petition failed to satisfy either of
    §2254(d)’s requirements. With respect to the District
    Court’s conclusion that the state court had unreasonably
    applied clearly established federal law, the Fifth Circuit
    rejected the notion that any of this Court’s precedents
    required a state court to grant an Atkins claimant the
    funds necessary to make a threshold showing of intellec-
    tual disability. 
    See 744 F.3d, at 925
    –926. As for the
    District Court’s holding that the state court’s decision
    rested on an unreasonable determination of the facts, the
    Fifth Circuit declared that its “review of the record per-
    suad[ed it] that the state court did not abuse its discretion
    when it denied Brumfield an evidentiary hearing.” 
    Id., at 926.
    Having found that Brumfield’s petition failed to clear
    §2254(d)’s hurdle, the Fifth Circuit did not review the
    District Court’s conclusion that Brumfield is, in fact,
    intellectually disabled. See 
    id., at 927,
    and n. 8.
    We granted certiorari on both aspects of the Fifth Cir-
    cuit’s §2254(d) analysis, 574 U. S. ___ (2014), and now
    vacate its decision and remand for further proceedings.
    II
    Before this Court, Brumfield advances both of the ra-
    tionales on which the District Court relied in holding
    §2254(d) to be satisfied. Because we agree that the state
    court’s rejection of Brumfield’s request for an Atkins hear-
    Cite as: 576 U. S. ____ (2015)                   7
    Opinion of the Court
    ing was premised on an “unreasonable determination of
    the facts” within the meaning of §2254(d)(2), we need not
    address whether its refusal to grant him expert funding,
    or at least the opportunity to seek pro bono expert assis-
    tance to further his threshold showing, reflected an “un-
    reasonable application of . . . clearly established Federal
    law,” §2254(d)(1).
    In conducting the §2254(d)(2) inquiry, we, like the
    courts below, “look through” the Louisiana Supreme
    Court’s summary denial of Brumfield’s petition for review
    and evaluate the state trial court’s reasoned decision
    refusing to grant Brumfield an Atkins evidentiary hearing.
    See Johnson v. Williams, 568 U. S. ___, ___, n. 1 (2013)
    (slip op., at 6, n. 1); Ylst v. Nunnemaker, 
    501 U.S. 797
    ,
    806 (1991). Like Brumfield, we do not question the pro-
    priety of the legal standard the trial court applied, and
    presume that a rule according an evidentiary hearing only
    to those capital defendants who raise a “reasonable doubt”
    as to their intellectual disability is consistent with our
    decision in Atkins. Instead, we train our attention on the
    two underlying factual determinations on which the trial
    court’s decision was premised—that Brumfield’s IQ score
    was inconsistent with a diagnosis of intellectual disability
    and that he had presented no evidence of adaptive im-
    pairment. App. to Pet. for Cert. 171a–172a.3
    ——————
    3 The dissent accuses us of “recasting legal determinations as factual
    ones.” Post, at 15 (opinion of THOMAS, J.) (emphasis deleted) (hereinaf-
    ter the dissent). But we subject these determinations to review under
    §2254(d)(2) instead of §2254(d)(1) because we are concerned here not
    with the adequacy of the procedures and standards the state court
    applied in rejecting Brumfield’s Atkins claim, but with the underlying
    factual conclusions the court reached when it determined that the
    record evidence was inconsistent with intellectual disability. See
    Maggio v. Fulford, 
    462 U.S. 111
    , 117 (1983) (per curiam) (reviewing
    under the predecessor to §2254(d)(2) the “factual conclusions” underly-
    ing a state court’s conclusion that a criminal defendant had raised no
    doubt as to his competency to stand trial). We look to Louisiana case
    8                       BRUMFIELD v. CAIN
    Opinion of the Court
    We may not characterize these state-court factual de-
    terminations as unreasonable “merely because [we] would
    have reached a different conclusion in the first instance.”
    Wood v. Allen, 
    558 U.S. 290
    , 301 (2010). Instead,
    §2254(d)(2) requires that we accord the state trial court
    substantial deference. If “ ‘[r]easonable minds reviewing
    the record might disagree’ about the finding in question,
    ‘on habeas review that does not suffice to supersede the
    trial court’s . . . determination.’ ” 
    Ibid. (quoting Rice v.
    Collins, 
    546 U.S. 333
    , 341–342 (2006)). As we have also
    observed, however, “[e]ven in the context of federal habeas,
    deference does not imply abandonment or abdication of
    judicial review,” and “does not by definition preclude
    relief.” Miller-El v. Cockrell, 
    537 U.S. 322
    , 340 (2003).
    Here, our examination of the record before the state court
    compels us to conclude that both of its critical factual
    determinations were unreasonable.
    A
    The state trial court’s rejection of Brumfield’s request
    for an Atkins hearing rested, first, on Dr. Bolter’s testi-
    mony that Brumfield scored 75 on an IQ test and may have
    scored higher on another test. See App. to Pet. for Cert.
    171a. These scores, the state court apparently believed,
    belied the claim that Brumfield was intellectually disabled
    because they necessarily precluded any possibility that he
    possessed subaverage intelligence—the first of the three
    criteria necessary for a finding of intellectual disability.
    ——————
    law only because it provides the framework in which these factual
    determinations were made, and makes clear that the state court’s
    decision rejecting Brumfield’s Atkins claim was premised on those
    determinations. And we apply §2254(d)(2) at the behest of the State
    itself, which invokes that provision (and §2254(e)(1)’s similarly fact-
    focused standard) in contending that AEDPA bars Brumfield’s Atkins
    claim, and characterizes the determinations we review here as “highly
    factual.” Brief for Respondent 25.
    Cite as: 576 U. S. ____ (2015)                    9
    Opinion of the Court
    But in fact, this evidence was entirely consistent with
    intellectual disability.
    To qualify as “significantly subaverage in general intel-
    lectual functioning” in Louisiana, “one must be more than
    two standard deviations below the mean for the test of
    intellectual functioning.” 
    Williams, 831 So. 2d, at 853
    (internal quotation marks omitted). On the Wechsler
    scale for IQ—the scale employed by Dr. Bolter—that
    would equate to a score of 70 or less. See 
    id., at 853–854,
    n. 26.
    As the Louisiana Supreme Court cautioned in Williams,
    however, an IQ test result cannot be assessed in a vac-
    uum. In accord with sound statistical methods, the court
    explained: “[T]he assessment of intellectual functioning
    through the primary reliance on IQ tests must be tem-
    pered with attention to possible errors in measurement.”
    
    Ibid. Thus, Williams held,
    “[a]lthough Louisiana’s defini-
    tion of significantly subaverage intellectual functioning
    does not specifically use the word ‘approximately,’ because
    of the SEM [(standard error of measurement)], any IQ test
    score has a margin of error and is only a factor in as-
    sessing mental retardation.” 
    Id., at 855,
    n. 29.
    Accounting for this margin of error, Brumfield’s reported
    IQ test result of 75 was squarely in the range of potential
    intellectual disability. The sources on which Williams
    relied in defining subaverage intelligence both describe a
    score of 75 as being consistent with such a diagnosis. See
    AAMR, at 59; DSM–IV, at 41–42; see also State v. Dunn,
    2001–1635 (La. 5/11/10), 
    41 So. 3d 454
    , 470 (“The ranges
    associated with the two scores of 75 brush the threshold
    score for a mental retardation diagnosis”).4 Relying on
    ——————
    4 The dissent insists that we have ignored language in Williams es-
    tablishing that “the requisite IQ could range ‘from 66 to 74.’ ” Post, at
    18 (quoting 
    Williams, 831 So. 2d, at 854
    , n. 26). But the dissent
    wrenches the quoted language out of context. The Williams Court
    actually said: “One SEM is plus or minus a specified number of IQ
    10                      BRUMFIELD v. CAIN
    Opinion of the Court
    similar authorities, this Court observed in Atkins that “an
    IQ between 70 and 75 or lower . . . is typically considered
    the cutoff IQ score for the intellectual function prong of
    the mental retardation 
    definition.” 536 U.S., at 309
    , n. 5.
    Indeed, in adopting these definitions, the Louisiana Su-
    preme Court anticipated our holding in Hall v. Florida,
    572 U. S. ___ (2014), that it is unconstitutional to foreclose
    “all further exploration of intellectual disability” simply
    because a capital defendant is deemed to have an IQ above
    70. Id., at ___ (slip op., at 1); see also id., at ___ (slip op.,
    at 12) (“For professionals to diagnose—and for the law
    then to determine—whether an intellectual disability
    exists once the SEM applies and the individual’s IQ score
    is 75 or below the inquiry would consider factors indicat-
    ing whether the person had deficits in adaptive function-
    ing”). To conclude, as the state trial court did, that Brum-
    field’s reported IQ score of 75 somehow demonstrated that
    he could not possess subaverage intelligence therefore
    reflected an unreasonable determination of the facts.
    Nor was there evidence of any higher IQ test score that
    could render the state court’s determination reasonable.
    The state court claimed that Dr. Jordan, who examined
    Brumfield but never testified at trial, “came up with a
    little bit higher IQ.” App. to Pet. for Cert. 171a. At trial,
    the existence of such a test score was mentioned only
    during the cross-examination of Dr. Bolter, who had sim-
    ply acknowledged the following: “Dr. Jordan rated his
    intelligence just a little higher than I did. But Dr. Jordan
    also only did a screening test and I gave a standardized
    measure of intellectual functioning.” App. 133a. And in
    fact, Dr. Jordan’s written report provides no IQ score. See
    ——————
    points. Thus, an IQ of 70 could range from 66 to 74 assuming an SEM
    of 
    4.” 831 So. 2d, at 854
    , n. 26. Williams did not thereby hold that an
    SEM of 4, and a resultant range of 66 to 74, must be used; it was
    simply using this example to illustrate the concept of SEM.
    Cite as: 576 U. S. ____ (2015)                    11
    Opinion of the Court
    
    id., at 429a.5
    The state court therefore could not reason-
    ably infer from this evidence that any examination Dr.
    Jordan had performed was sufficiently rigorous to pre-
    clude definitively the possibility that Brumfield possessed
    subaverage intelligence. See State v. Dunn, 2001–1635
    (La. 11/1/02), 
    831 So. 2d 862
    , 886, n. 9 (ordering Atkins
    evidentiary hearing even though “prison records indi-
    cate[d]” the defendant had an “ ‘estimated IQ of 76,’ ” em-
    phasizing testimony that prison officials “did not do the
    formal IQ testing”).
    B
    The state court’s refusal to grant Brumfield’s request
    for an Atkins evidentiary hearing rested, next, on its con-
    clusion that the record failed to raise any question as
    to Brumfield’s “impairment . . . in adaptive skills.” App.
    to Pet. for Cert. 171a. That determination was also
    unreasonable.
    The adaptive impairment prong of an intellectual dis-
    ability diagnosis requires an evaluation of the individual’s
    ability to function across a variety of dimensions. The
    Louisiana Supreme Court in Williams described three
    separate sets of criteria that may be utilized in making
    this assessment. 
    See 831 So. 2d, at 852
    –854. Although
    Louisiana courts appear to utilize all three of these tests
    in evaluating adaptive impairment, see 
    Dunn, 41 So. 3d, at 458
    –459, 463, for the sake of simplicity we will assume
    that the third of these tests, derived from Louisiana statu-
    ——————
    5 There  is some question whether Dr. Jordan’s report, which was
    introduced in federal habeas proceedings, was ever entered into the
    state-court record. See 
    854 F. Supp. 2d 366
    , 380, n. 13 (MD La. 2012)
    (accepting counsel’s representation that the report was not in the state-
    court record); but see Tr. of Oral Arg. 50 (State’s counsel asserting that
    it was). We see no need to resolve this dispute, though we note that the
    report is not currently contained in the state-court record lodged with
    the District Court.
    12                        BRUMFIELD v. CAIN
    Opinion of the Court
    tory law, governed here, as it appears to be the most fa-
    vorable to the State.6 Under that standard, an individual
    may be intellectually disabled if he has “substantial func-
    tional limitations in three or more of the following areas of
    major life activity: (i) Self-care. (ii) Understanding and use
    of language. (iii) Learning. (iv) Mobility. (v) Self-direction.
    (vi) Capacity for independent living.” Williams, 
    831 So. 2d
    , at 854 (quoting then La. Rev. Stat. Ann. §28:381(12)
    (repealed 2005)).
    The record before the state court contained sufficient
    evidence to raise a question as to whether Brumfield met
    these criteria. During the sentencing hearing, Brumfield’s
    mother testified that Brumfield had been born prematurely
    at a very low birth weight. App. 28a. She also recounted
    that he had been taken out of school in the fifth grade
    and hospitalized due to his behavior, and recalled an
    incident in which he suffered a seizure. 
    Id., at 34a–38a,
    41a, 47a.
    Social worker Dr. Guin elaborated on this testimony,
    explaining that Brumfield’s low birth weight indicated
    “that something ha[d] gone wrong during the pregnancy,”
    that medical records suggested Brumfield had “slower
    responses than normal babies,” and that “they knew that
    something was wrong at that point.” 
    Id., at 75a–76a.
    Dr.
    Guin also confirmed that, beginning in fifth grade, Brum-
    field had been placed in special classes in school and in
    multiple mental health facilities, and had been prescribed
    ——————
    6 The other two standards set forth in Williams were: the AAMR cri-
    teria, which require “ ‘limitations in two or more of the following appli-
    cable adaptive skill areas: communication, self-care, home living, social
    skills, community use, self-direction, health and safety, functional
    academics, leisure, and work,’ ” 
    831 So. 2d
    , at 852, n. 22; and the DSM–
    IV criteria, which similarly require “ ‘significant limitations’ ” in “ ‘at
    least two of the following skill areas: communication, self-care, home
    living, social/interpersonal skills, use of community resources, self-
    direction, functional academic skills, work, leisure, health, and safety,’ ”
    
    id., at 853,
    n. 25.
    Cite as: 576 U. S. ____ (2015)                   13
    Opinion of the Court
    antipsychotics and sedatives.      
    Id., at 89a,
    93a–94a.7
    Moreover, one report Dr. Guin reviewed from a facility
    that treated Brumfield as a child “questioned his intellec-
    tual functions,” and opined that “he probably had a learn-
    ing disability related to some type of slowness in motor
    development, some type of physiological [problem].” 
    Id., at 89a.
    Dr. Guin herself reached a similar conclusion, stat-
    ing that Brumfield “obviously did have a physiologically
    linked learning disability that he was born with,” and that
    his “basic problem was that he . . . could not process in-
    formation.” 
    Id., at 90a,
    98a.
    Finally, Dr. Bolter, who had performed “a comprehen-
    sive battery of tests,” confirmed that Brumfield had a
    “borderline general level of intelligence.” 
    Id., at 127a–
    128a. His low intellect manifested itself in a fourth-grade
    reading level—and he reached that level, Dr. Bolter elabo-
    rated, only with respect to “simple word recognition,” and
    “not even comprehension.” 
    Id., at 128a;
    see also 
    id., at 134a.
    In a written report submitted to the state court, Dr.
    Bolter further noted that Brumfield had deficiencies “fre-
    quently seen in individuals with a history of learning
    disabilities,” and “clearly” had “learning characteristics
    that make it more difficult for him to acquire new infor-
    mation.” 
    Id., at 418a,
    420a. Dr. Bolter also testified that
    Brumfield’s low birth weight had “place[d] him [at] a risk
    of some form of potential neurological trauma,” and af-
    firmed that the medications administered to Brumfield as
    a child were generally reserved for “severe cases.” 
    Id., at 130a,
    132a.
    All told, then, the evidence in the state-court record
    provided substantial grounds to question Brumfield’s
    ——————
    7 While   the dissent contends that the record shows Brumfield’s
    placement in special education classes was simply due to his misbehav-
    ior, post, at 19, Dr. Guin testified that Brumfield’s behavioral problems
    were in part a function of a learning disability, see App. 86a.
    14                  BRUMFIELD v. CAIN
    Opinion of the Court
    adaptive functioning. An individual, like Brumfield, who
    was placed in special education classes at an early age,
    was suspected of having a learning disability, and can
    barely read at a fourth-grade level, certainly would seem
    to be deficient in both “[u]nderstanding and use of lan-
    guage” and “[l]earning”—two of the six “areas of major life
    activity” identified in Williams. 
    831 So. 2d
    , at 854. And
    the evidence of his low birth weight, of his commitment to
    mental health facilities at a young age, and of officials’
    administration of antipsychotic and sedative drugs to him
    at that time, all indicate that Brumfield may well have
    had significant deficits in at least one of the remaining
    four areas. See 
    ibid. In advancing its
    contrary view of the record, the state
    court noted that Dr. Bolter had described Brumfield as
    someone with “an antisocial personality.” App. 127a; see
    App. to Pet. for Cert. 171a. The relevance of this diagnosis
    is, however, unclear, as an antisocial personality is not
    inconsistent with any of the above-mentioned areas of
    adaptive impairment, or with intellectual disability more
    generally. The DSM–IV—one of the sources on which the
    Williams court relied in defining intellectual disability—
    provides: “The diagnostic criteria for Mental Retardation
    do not include an exclusion criterion; therefore, the diag-
    nosis should be made . . . regardless of and in addition to
    the presence of another disorder.” DSM–IV, at 47; see also
    AAMR, at 172 (noting that individuals with intellectual
    disability also tend to have a number of other mental
    health disorders, including personality disorders).
    To be sure, as the dissent emphasizes, post, at 13–14,
    18, other evidence in the record before the state court may
    have cut against Brumfield’s claim of intellectual disabil-
    ity. Perhaps most significant, in his written report Dr.
    Bolter stated that Brumfield “appears to be normal from a
    neurocognitive perspective,” with a “normal capacity to
    learn and acquire information when given the opportunity
    Cite as: 576 U. S. ____ (2015)           15
    Opinion of the Court
    for repetition,” and “problem solving and reasoning skills”
    that were “adequate.” App. 421a. Likewise, the underly-
    ing facts of Brumfield’s crime might arguably provide
    reason to think that Brumfield possessed certain adaptive
    skills, as the murder for which he was convicted required
    a degree of advanced planning and involved the acquisi-
    tion of a car and guns. But cf. AAMR, at 8 (intellectually
    disabled persons may have “strengths in social or physical
    capabilities, strengths in some adaptive skill areas, or
    strengths in one aspect of an adaptive skill in which they
    otherwise show an overall limitation”).
    It is critical to remember, however, that in seeking an
    evidentiary hearing, Brumfield was not obligated to show
    that he was intellectually disabled, or even that he would
    likely be able to prove as much. Rather, Brumfield needed
    only to raise a “reasonable doubt” as to his intellectual
    disability to be entitled to an evidentiary hearing. See
    Williams, 
    831 So. 2d
    , at 858, n. 33. The Louisiana Su-
    preme Court’s decision in Williams illustrated how low the
    threshold for an evidentiary hearing was intended to be:
    There, the court held that the defendant was entitled to a
    hearing on his Atkins claim notwithstanding the fact that
    “the defense’s own expert testified unequivocally, at both
    the guilt and penalty phases of trial, that [the] defendant
    is not mentally retarded,” an assessment “based on the
    fact that [the] defendant [was] not deficient in adaptive
    functioning.” 
    831 So. 2d
    , at 855; see also Dunn, 
    831 So. 2d
    , at 885, 887 (ordering hearing despite expert testimony
    that the defendant “had never been identified as a child
    who was a slow learner,” and had “received college credit
    for courses completed during his incarceration”). Similarly,
    in light of the evidence of Brumfield’s deficiencies, none
    of the countervailing evidence could be said to foreclose all
    reasonable doubt. An individual who points to evidence
    that he was at risk of “neurological trauma” at birth, was
    diagnosed with a learning disability and placed in special
    16                   BRUMFIELD v. CAIN
    Opinion of the Court
    education classes, was committed to mental health facili-
    ties and given powerful medication, reads at a fourth-
    grade level, and simply cannot “process information,” has
    raised substantial reason to believe that he suffers from
    adaptive impairments.
    That these facts were alone sufficient to raise a doubt as
    to Brumfield’s adaptive impairments is all the more ap-
    parent given that Brumfield had not yet had the oppor-
    tunity to develop the record for the purpose of proving an
    intellectual disability claim. At his pre-Atkins trial,
    Brumfield had little reason to investigate or present evi-
    dence relating to intellectual disability. In fact, had he
    done so at the penalty phase, he ran the risk that it would
    “enhance the likelihood . . . future dangerousness [would]
    be found by the jury.” 
    Atkins, 536 U.S., at 321
    . Thus,
    given that the evidence from trial provided good reason to
    think Brumfield suffered from an intellectual disability,
    there was even greater cause to believe he might prove
    such a claim in a full evidentiary hearing. Indeed, the
    Louisiana Supreme Court had made clear that a capital
    defendant in Brumfield’s position should be accorded this
    additional benefit of the doubt when it defined the stand-
    ard for assessing whether a hearing is required. Echoing
    Atkins’ observation that penalty-phase evidence of intel-
    lectual disability can be a “two-edged sword,” ibid., Wil-
    liams noted that where a trial “was conducted prior to
    Atkins,” the defense’s “trial strategy may have been to
    shift the focus away from any diagnosis of mental retarda-
    tion.” 
    831 So. 2d
    , at 856, n. 31. For that reason, the Wil-
    liams court considered the fact that the defendant “ha[d]
    not had the issue of mental retardation put before the fact
    finder in light of the Atkins restriction on the death penalty”
    as a factor supporting the requisite threshold showing
    that “entitled [him] to an evidentiary hearing.” 
    Id., at 857;
    accord, Dunn, 
    831 So. 2d
    , at 886. Here, the state trial
    court should have taken into account that the evidence
    Cite as: 576 U. S. ____ (2015)                   17
    Opinion of the Court
    before it was sought and introduced at a time when Brum-
    field’s intellectual disability was not at issue. The court’s
    failure to do so resulted in an unreasonable determination
    of the facts.
    III
    A
    Urging affirmance of the decision below, the State ad-
    vances two additional arguments that we need discuss
    only briefly.
    First, the State suggests that rather than being evalu-
    ated pursuant to §2254(d)(2)’s “unreasonable determina-
    tion of the facts” standard, Brumfield’s attack on the state
    trial court’s decision should instead be “ ‘reviewed under
    the arguably more deferential standard set out in
    §2254(e)(1).’ ” Brief for Respondent 30 (quoting 
    Wood, 558 U.S., at 301
    ).8 We have not yet “defined the precise rela-
    tionship between §2254(d)(2) and §2254(e)(1),” Burt v.
    Titlow, 571 U. S. ___, ___ (2013) (slip op., at 5), and we
    need not do so here. The State did not press below the
    theory that §2254(e)(1) supplies the governing standard
    when a court evaluates whether a habeas petitioner has
    satisfied §2254(d)(2)’s requirements, the Fifth Circuit did
    not address that possibility, and the State in its brief in
    opposition to certiorari failed to advance any specific
    argument that the decision below could be supported by
    invocation of that statutory provision. See Brief in Oppo-
    sition 60–64. The argument is therefore “properly ‘deemed
    waived.’ ” Granite Rock Co. v. Teamsters, 
    561 U.S. 287
    ,
    306 (2010) (quoting this Court’s Rule 15.2).
    ——————
    8 Section 2254(e)(1) provides: “In a proceeding instituted by an appli-
    cation for a writ of habeas corpus by a person in custody pursuant to
    the judgment of a State court, a determination of a factual issue made
    by a State court shall be presumed to be correct. The applicant shall
    have the burden of rebutting the presumption of correctness by clear
    and convincing evidence.”
    18                  BRUMFIELD v. CAIN
    Opinion of the Court
    Second, the State contends that Brumfield’s request for
    an Atkins hearing was properly rejected because the rec-
    ord evidence failed to show that Brumfield’s intellectual
    deficiencies manifested while he was in the “developmen-
    tal stage”—that is, before he reached adulthood. Wil-
    liams, 
    831 So. 2d
    , at 854. But the state trial court never
    made any finding that Brumfield had failed to produce
    evidence suggesting he could meet this age-of-onset re-
    quirement. There is thus no determination on that point
    to which a federal court must defer in assessing whether
    Brumfield satisfied §2254(d). See Panetti v. Quarterman,
    
    551 U.S. 930
    , 953–954 (2007); compare, e.g., Wiggins v.
    Smith, 
    539 U.S. 510
    , 534 (2003) (reviewing de novo the
    question whether petitioner had suffered prejudice where
    state court’s reasoned decision rejecting claim under
    Strickland v. Washington, 
    466 U.S. 668
    (1984), was prem-
    ised solely on conclusion that attorney’s performance had
    not been constitutionally deficient), with Harrington v.
    Richter, 
    562 U.S. 86
    , 98 (2011) (requiring federal habeas
    court to defer to hypothetical reasons state court might
    have given for rejecting federal claim where there is no
    “opinion explaining the reasons relief has been denied”).
    In any event, the state-court record contained ample
    evidence creating a reasonable doubt as to whether Brum-
    field’s disability manifested before adulthood: Both Dr.
    Guin and Dr. Bolter testified at length about Brumfield’s
    intellectual shortcomings as a child and their possible
    connection to his low birth weight. If Brumfield presented
    sufficient evidence to suggest that he was intellectually
    limited, as we have made clear he did, there is little ques-
    tion that he also established good reason to think that he
    had been so since he was a child.
    B
    Finally, we offer a few additional words in response to
    JUSTICE THOMAS’ dissent. We do not deny that Brum-
    Cite as: 576 U. S. ____ (2015)           19
    Opinion of the Court
    field’s crimes were terrible, causing untold pain for the
    victims and their families. But we are called upon today
    to resolve a different issue. There has already been one
    death that society rightly condemns. The question here is
    whether Brumfield cleared AEDPA’s procedural hurdles,
    and was thus entitled to a hearing to show that he so
    lacked the capacity for self-determination that it would
    violate the Eighth Amendment to permit the State to
    impose the “law’s most severe sentence,” Hall, 572 U. S.,
    at ___ (slip op., at 7), and take his life as well. That
    question, and that question alone, we answer in the
    affirmative.
    *     *     *
    We hold that Brumfield has satisfied the requirements
    of §2254(d). The judgment of the United States Court of
    Appeals for the Fifth Circuit is therefore vacated, and the
    case is remanded for further proceedings consistent with
    this opinion.
    It is so ordered.
    Cite as: 576 U. S. ____ (2015)            1
    THOMAS, J., dissenting
    SUPREME COURT OF THE UNITED STATES
    _________________
    No. 13–1433
    _________________
    KEVAN BRUMFIELD, PETITIONER v.
    BURL CAIN, WARDEN
    ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 18, 2015]
    JUSTICE THOMAS, with whom THE CHIEF JUSTICE,
    JUSTICE SCALIA, and JUSTICE ALITO join as to all but Part
    I–C, dissenting.
    Federal collateral review of state convictions interrupts
    the enforcement of state criminal laws and undermines
    the finality of state-court judgments. The Antiterrorism
    and Effective Death Penalty Act of 1996 (AEDPA) ad-
    dresses that interference by constraining the ability of
    federal courts to grant relief to state prisoners. Today, the
    Court oversteps those limits in a decision that fails to
    respect the Louisiana state courts and our precedents. I
    respectfully dissent.
    I
    This case is a study in contrasts. On the one hand, we
    have Kevan Brumfield, a man who murdered Louisiana
    police officer Betty Smothers and who has spent the last
    20 years claiming that his actions were the product of
    circumstances beyond his control. On the other hand, we
    have Warrick Dunn, the eldest son of Corporal Smothers,
    who responded to circumstances beyond his control by
    caring for his family, building a professional football ca-
    reer, and turning his success on the field into charitable
    work off the field.
    2                   BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    A
    Given that the majority devotes a single sentence to a
    description of the crime for which a Louisiana jury sen-
    tenced Brumfield to death, I begin there.
    Corporal Smothers, a 14-year veteran of the Baton
    Rouge Police Department, was working a second job to
    support her family when she was murdered just after
    midnight on January 7, 1993. Following a 10-hour shift at
    the department on January 6, Corporal Smothers reported
    to a local grocery store, where she served as a uniformed
    security officer with the official authorization of the de-
    partment. She monitored the security of the grocery store
    and waited to escort the assistant manager, Kimen Lee, to
    a local bank to make the store’s nightly deposit.
    Corporal Smothers followed her usual practice of driving
    Lee to the bank in her police cruiser. Shortly after mid-
    night, they arrived at the bank’s night depository. As Lee
    leaned out of the passenger side door to make the deposit,
    she heard the racking of the slide on a handgun. Brum-
    field and his accomplice, Henri Broadway, then opened
    fire on the two women.
    Brumfield fired seven rounds from a .380-caliber hand-
    gun at close range from the left side of the cruiser, while
    Broadway fired five rounds from a .25-caliber handgun
    from the right rear of the cruiser. Brumfield hit Corporal
    Smothers five times in the forearm, chest, and head. Lee
    was hit multiple times as well, causing 11 entrance and
    exit wounds, but she somehow managed to slide over on
    the bench seat and take control of the police car. She
    drove to a nearby convenience store, where she was able to
    call for help and to describe Broadway to police. Emer-
    gency responders transported both women to the hospital.
    Corporal Smothers was pronounced dead on arrival. Lee
    survived.
    On January 11, 1993, Baton Rouge police arrested
    Brumfield for Corporal Smothers’ murder. After several
    Cite as: 576 U. S. ____ (2015)                     3
    THOMAS, J., dissenting
    hours of police interrogation, during which he denied
    involvement in the murder, Brumfield eventually gave a
    videotaped confession.1 He admitted that, after riding
    around at night looking for a “hustle,” he had come up
    with the idea to steal the grocery store’s deposit. He
    described how he and Broadway hid in the bushes waiting
    for the car to arrive, and how, when Lee looked back while
    trying to make the deposit, he started shooting. He admit-
    ted that he had fired seven rounds from his .380-caliber
    handgun, that Broadway had fired five shots with the .25-
    caliber handgun, and that a third man had served as the
    getaway driver.
    A Louisiana jury convicted Brumfield of first-degree
    murder. In addition to his videotaped confession, the
    State introduced evidence that Brumfield had spoken
    about committing a robbery to several people in the weeks
    leading up to the murder. He was facing sentencing on
    unrelated charges and had promised his pregnant girl-
    friend that he would obtain money to support her, their
    baby, and her child from a previous relationship while he
    was in jail. The State also introduced evidence that Brum-
    field had told an acquaintance right after the murder that
    he had just killed “a son of a bitch.” Record 3566.
    B
    At the penalty phase, the State sought a death sentence.
    It reintroduced the evidence from the guilt phase, along
    with evidence of Brumfield’s other criminal acts.2 The
    ——————
    1 The videotaped confession can be found at http://www.supremecourt.
    gov/media/media.aspx.
    2 Although not introduced at trial, it is worth noting that the night of
    Corporal Smothers’ murder was apparently not her first interaction
    with Brumfield. Six years earlier, she had caught him stealing and had
    given him a chance to turn his life around, a chance he unfortunately
    did not take. See W. Dunn & D. Yaegar, Running for My Life: My
    Journey in the Game of Football and Beyond 12 (2008). As Corporal
    Smothers’ eldest son recounted, “[Brumfield] told me a story that in
    4                      BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    felony convictions for which Brumfield was awaiting sen-
    tencing when he murdered Corporal Smothers were for
    attempted possession of cocaine and felony theft of a gun.
    Brumfield had worked only three months in his adult life
    because, as he had admitted to his psychologist, he found
    drug dealing a far more effective way to make money. In
    fact, he had been involved a few years earlier in the fatal
    shooting of a fellow drug dealer in a deal gone bad. And
    10 months after he murdered Corporal Smothers, Brum-
    field battered another police officer while in prison.
    The State also explained that Brumfield’s murder of
    Corporal Smothers was the culmination of a 2-week crime
    spree. On Christmas Day 1992, Brumfield robbed Anthony
    Miller at gunpoint after giving him a ride. He forced
    Miller out of the car, put a gun to Miller’s head, and pulled
    the trigger. Fortunately for Miller, the gun misfired, and
    he survived. One week later, Brumfield robbed Edna
    Marie Perry and her daughter Trina Perkins at gunpoint
    as they were walking along the side of the road. Brum-
    field pulled alongside them, pointed a sawed-off shotgun
    at Perry, and said, “Hand it over, bitch.” 
    Id., at 3790.
    Perry turned over her purse, but pleaded with Brumfield
    to give back the pictures from her deceased son’s funeral
    that she carried in the purse. He responded none too
    courteously, “Bitch, you dead,” and drove away. 
    Ibid. The State also
    introduced evidence about the murder’s
    broader impact. In addition to serving as a police officer,
    Corporal Smothers was a single mother to six children and
    a volunteer coach at a local track club. Her children, who
    ranged from 10 to 18 years old, went to live with their
    grandmother after the murder. The loss of their mother
    ——————
    1987, my mother, working security at a store, caught him stealing and
    made him put back whatever he took. . . . Brumfield said my mom could
    have made an example of him that day, but she elected not to. I
    thought to myself, that was Mom—always giving people second chances
    to do right.” 
    Ibid. Cite as: 576
    U. S. ____ (2015)            5
    THOMAS, J., dissenting
    weighed heavily on all of them. It was particularly hard
    on Corporal Smothers’ eldest son, Warrick, who had been
    especially close to his mother, and on her second eldest
    son, Derrick Green, who had been hoping to spend more
    time with her after Warrick went off to college. Derrick
    was deprived of that chance, and he and Warrick had to
    take on extra responsibilities to care for their younger
    siblings.
    For his part, Brumfield introduced evidence that his
    crimes were “beyond his control,” a product of his disad-
    vantaged background. 
    Id., at 3927.
    He was born at a low
    birth weight, and his mother testified that he spent sev-
    eral months in the hospital shortly after his birth. His
    father left the family, and his stepfather would make him
    sit in the corner on hot rice, whip him, and hit him over
    the head with a telephone book. His brother eventually
    decided to go live with their biological father. Brumfield
    opted to stay with his mother and stepfather.
    When he was around seven or eight years old, Brumfield
    began to have behavioral problems. He had trouble stay-
    ing in his seat at school, was disruptive, easily distracted,
    and prone to fighting. He was eventually taken to a psy-
    chiatric hospital to address his hyperactivity. Although he
    was a straight-A student until the third grade, his time in
    four or five group homes educated him in the criminal
    lifestyle, and his grades began to suffer.
    Dr. Cecile Guin, a social worker, testified that Brum-
    field’s hyperactivity and acting out could be traced largely
    to his low birth weight, lack of a supportive home envi-
    ronment, and abusive stepfather. Although she was not a
    medical doctor, she concluded that Brumfield had a “neu-
    rologically based hyperactive or learning disability prob-
    lem.” 
    Id., at 3886.
    She acknowledged, however, that his
    school records described him as having a behavior disor-
    der—“a pattern situation or inappropriate behavior ex-
    tended over a long period of time which cannot be ex-
    6                    BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    plained by intellectual, sensory, neurological or other
    general factors.” 
    Id., at 3882.
    She also admitted on cross-
    examination that a psychologist, Brian T. Jordan, had not
    diagnosed Brumfield as suffering from any neurological
    disorder, but instead from “a sociopathic personality dis-
    order, antisocial type, poor impulse control, especially in
    the area of aggression.” 
    Id., at 3897–3898.
       Dr. John Bolter, a clinical neuropsychologist, testified on
    behalf of the defense that Brumfield suffered from an
    antisocial personality disorder. Based on a battery of tests
    employed to determine whether Brumfield suffered from
    “any kind of neurological deficits in cognitive functions,”
    Dr. Bolter concluded that Brumfield early on in life “mani-
    fest[ed] . . . a conduct disorder with extreme levels of
    aggressivity and a disregard for the basic rights of others,”
    along with “an attention deficit disorder of some type.”
    
    Id., at 3904.
    Over time, he “emerged into what looks more
    like an antisocial personality,” and he continued to have
    “attention difficulty” and “borderline general level of
    intelligence.” 
    Ibid. Brumfield’s IQ score
    was a 75, placing
    him at about the seventh percentile of the general popula-
    tion or “on the low end of intelligence.” 
    Ibid. His reading skills
    were at about a fourth-grade level, while his math
    and spelling skills were at about a sixth-grade level. On
    the other hand, Dr. Bolter concluded that Brumfield’s
    “problem solving, judgment and reasoning skills [we]re
    sufficient to meet the demands of everyday adulthood and
    he [wa]s not showing any decrement in the types of prob-
    lems one would assume to see if they were suffering from
    an underlying organic basis or mental illness.” 
    Id., at 275.
    Dr. Bolter had also reviewed Dr. Jordan’s report, and he
    testified that the only inconsistency in their conclusions
    was that Dr. Jordan rated Brumfield’s intelligence “just a
    little higher than” he did. 
    Id., at 3907.
       The jury unanimously recommended that Brumfield be
    sentenced to death. It found three statutory aggravators
    Cite as: 576 U. S. ____ (2015)                      7
    THOMAS, J., dissenting
    that made him eligible for that penalty: He was engaged
    in the attempted perpetration of an armed robbery; he
    knowingly created a risk of death or great bodily harm to
    more than one person; and the victim was a peace officer
    engaged in her lawful duties. The jury found no statutory
    mitigators.
    C
    Brumfield’s argument that his actions were the product
    of his disadvantaged background is striking in light of the
    conduct of Corporal Smothers’ children following her
    murder. Most widely known is that of Warrick. Though
    he had turned 18 just two days before Brumfield murdered
    his mother, he quickly stepped into the role of father
    figure to his younger siblings.3 In his view, it “was up to
    [him] to make sure that everybody grew up to be some-
    body.” W. Dunn & D. Yaegar, Running for my Life: My
    Journey in the Game of Football and Beyond 37 (2008).
    To that end, Warrick led by example, becoming a star
    running back at Florida State University and then in the
    National Football League (NFL). During his time at
    Florida State, he set records on the field while coping with
    the loss of his mother. 
    Id., at 71,
    111, 117. Though sepa-
    rated from his family in Louisiana, he called his brothers
    and sisters regularly,4 sought parenting advice from his
    ——————
    3 Like Brumfield, Warrick’s father was not a part of his life. 
    Id., at 51.
    But, unlike Brumfield, Warrick did not use the absence of a father
    figure as a justification for murder. 
    Ibid. Instead, he recognized
    that
    his mother had been “the family patriarch” when she was alive, 
    ibid. and that he
    had a responsibility to take on that role after her death, 
    id., at 37.
       4 In a letter to Brumfield, one of Corporal Smothers’ daughters,
    Summer, later wrote: “Can you imagine life at 14 without your mother,
    no father to step up and take responsibility for his seed? Not knowing
    where your next meal will come from, or where you are going to lay
    your head at night, or even who’s going to sacrifice their life to raise six
    children because of someone’s selfish acts? Do you know what this can
    8                       BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    coach, and returned home when he could. 
    Id., at 111–113.
    He kept his mother’s pearl earrings, stained with her
    blood from the night she was murdered, in a box on his
    dresser. 
    Id., at 71.
    After four years at Florida State,
    Dunn was drafted by the Tampa Bay Buccaneers. Con-
    cerned that some of his siblings were struggling in Baton
    Rouge, he moved the three youngest into his home in
    Tampa Bay. 
    Id., at 139.
    Although the strain of playing
    for the Buccaneers and raising his family weighed on him,
    he “accepted it as [his] responsibility . . . to make sure they
    stayed on the right path.” 
    Ibid. While balancing football
    and family, Dunn still found
    time for others. He started Homes for the Holidays,
    a charitable organization that decorates and fully fur-
    nishes—down to the toothbrush—homes obtained by single
    mothers through first-time homeowner assistance pro-
    grams. Dunn was inspired by his own mother, who spent
    years working toward the purchase of a home for her
    family, but, thanks to Brumfield, did not live to reach her
    goal. 
    Id., at 152.
      Dunn’s contributions did not end there. After joining
    the Atlanta Falcons in 2002, he expanded the reach of
    Homes for the Holidays, 
    id., at 157;
    traveled overseas to
    visit our Armed Forces, 
    id., at 200–201;
    led an effort to
    raise money from the NFL to help respond to the tragic
    effects of Hurricane Katrina, 
    id., at 202–205;
    and became
    a founding member of Athletes for Hope, an organization
    dedicated to helping athletes find and pursue charitable
    opportunities, 
    id., at 207–208.
    Following his retirement
    from professional football in 2008, Dunn launched two
    more charitable organizations in honor of his mother:
    Betty’s Hope, a mobile bereavement program that offers
    no-cost grief counseling services to children in the Baton
    ——————
    [do to] a 14-year-old’s physical, emotional, and mental state of mind?”
    
    Id., at 13
    (italics deleted).
    Cite as: 576 U. S. ____ (2015)            9
    THOMAS, J., dissenting
    Rouge area, and Homes for Service, a program dedicated
    to helping service members, police officers, and firefighters
    achieve home ownership. As Dunn once remarked, “I
    knew that was what my mother would have been most
    proud of: not my records, not my awards, but the way I
    used my worldly success to give something back.” 
    Id., at 157.
                                  D
    Brumfield, meanwhile, has spent the last 20 years
    engaged in a ceaseless campaign of review proceedings.
    He raised numerous challenges on direct appeal to the
    trial court’s discovery orders, admission of evidence, jury
    instructions, and preservation of the record; the prosecu-
    tor’s references during the penalty phase; and the alleged
    deficiencies of his trial counsel. The Louisiana Supreme
    Court rejected each of these claims, State v. Brumfield,
    96–2667 (La. 10/20/98), 
    737 So. 2d 660
    , and this Court
    denied his petition for a writ of certiorari, Brumfield v.
    Louisiana, 
    526 U.S. 1025
    (1999).
    In 2000, Brumfield filed his first petition for state post-
    conviction relief. In that petition, among other things, he
    alleged 9 instances of prosecutorial misconduct, over 18
    instances of ineffective assistance of counsel, and at least
    17 constitutional errors in the jury instructions at the
    guilt phase of his trial.
    Brumfield sought and received multiple extensions of
    time before finally filing his amended petition for state
    postconviction relief in 2003. He raised many of the same
    claims as he had in his initial petition, but also asserted
    for the first time that he was mentally retarded and there-
    fore ineligible for the death penalty under Atkins v. Vir-
    ginia, 
    536 U.S. 304
    (2002). In support of that claim, he
    alleged that his IQ score was 75, that his reading level
    was that of a fourth grader, that he was born prematurely
    with a low birth weight and indications of slower responses
    10                  BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    than normal babies, that he had suffered seizures and
    been prescribed a variety of medications since childhood,
    that he was twice treated in psychiatric hospitals during
    childhood and adolescence, and that he had been diag-
    nosed with a learning disability.
    The state court denied Brumfield’s petition. In a ruling
    from the bench, the court explained that not every defend-
    ant who requests an evidentiary hearing on an Atkins
    claim is entitled to one. Based on its review of “the appli-
    cation, the response, the record, portions of the transcript
    on that issue, and the evidence presented, including Dr.
    Bolter’s testimony, Dr. Guin’s testimony, which refers to
    and discusses Dr. Jordan’s report,” App. to Pet. for Cert.
    171a, it concluded that Brumfield had not met his burden
    to make a threshold showing of mental retardation. In
    particular, the court noted that Brumfield had an IQ score
    of 75 or higher and had demonstrated no impairment in
    adaptive skills. Although Brumfield had requested fees to
    develop his Atkins claim, the trial court did not explicitly
    rule on the motion, and Brumfield’s counsel did not
    prompt him to do so.
    Brumfield then sought federal collateral review. In his
    first habeas application, he repeated many of his claims,
    including the claim that he is ineligible to be executed
    under Atkins. He requested funds to develop that claim in
    an evidentiary hearing. The District Court dismissed all
    of his claims except for the Atkins one and ordered an
    evidentiary hearing. As the majority describes, the Dis-
    trict Court eventually granted a writ of habeas corpus. It
    concluded that the state court had based its denial of
    Brumfield’s Atkins claim on an unreasonable determina-
    tion of the facts and had unreasonably applied clearly
    established Supreme Court precedent in denying him
    funds to develop the claim. The U. S. Court of Appeals for
    the Fifth Circuit reversed, concluding that the District
    Court should not have conducted an evidentiary hearing
    Cite as: 576 U. S. ____ (2015)           11
    THOMAS, J., dissenting
    and that AEDPA did not afford relief on either of the
    grounds identified by the District Court. 
    744 F.3d 918
    ,
    926–927 (2014).
    II
    AEDPA limits “the power of a federal court to grant an
    application for a writ of habeas corpus on behalf of a state
    prisoner.” Cullen v. Pinholster, 
    563 U.S. 170
    , ___ (2011)
    (slip op., at 8). As relevant here, 
    28 U.S. C
    . §2254(d)
    provides that a federal court may not grant an application
    “with respect to any claim that was adjudicated on the
    merits in State court proceedings unless the adjudica-
    tion of the claim—
    “(1) resulted in a decision that was contrary to, or
    involved an unreasonable application of, clearly estab-
    lished Federal law, as determined by the Supreme
    Court of the United States; or
    “(2) resulted in a decision that was based on an un-
    reasonable determination of the facts in light of the
    evidence presented in the State court proceeding.”
    In applying this “highly deferential standard for evaluat-
    ing state-court rulings, . . . state-court decisions [must] be
    given the benefit of the doubt.” Pinholster, 563 U. S., at
    ___ (slip op., at 9) (internal quotation marks omitted).
    They must be reviewed solely on “the record that was
    before the state court that adjudicated the claim on the
    merits.” Id., at ___, ___, and n. 7 (slip op., at 9, 12, and
    n. 7). And the prisoner must rebut any state court factual
    findings he seeks to challenge by clear and convincing
    evidence under §2254(e)(1). Burt v. Titlow, 571 U. S. ___,
    ___ (2013) (slip op., at 5).
    Brumfield presents two grounds for relief under this
    framework. First, he argues that the Louisiana state
    court denied his Atkins claim based on an unreasonable
    12                       BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    determination of the facts, §2254(d)(2).5 Second, he argues
    that the Louisiana state court violated clearly established
    federal law as determined by this Court when it denied
    him funding to develop evidence for that claim,
    §2254(d)(1).
    III
    The majority resolves the case solely on Brumfield’s first
    ground, so I begin there.
    A
    The Louisiana state court’s decision to deny Brumfield’s
    Atkins claim was not based on an unreasonable determi-
    nation of the facts. “[A] state-court factual determination
    is not unreasonable merely because the federal habeas
    court would have reached a different conclusion in the
    first instance.” Wood v. Allen, 
    558 U.S. 290
    , 301 (2010).
    Where the record supports a state court’s factual determi-
    nations, the prisoner cannot make that showing. See, e.g.,
    
    Titlow, supra
    , at ___–___ (slip op., at 6–7). Here, the state
    court rejected Brumfield’s Atkins claim in an oral ruling as
    follows:
    “Dr. Bolter in particular found [Brumfield] had an IQ
    of over—or 75. Dr. Jordan actually came up with a
    little bit higher IQ. I do not think that the defendant
    ——————
    5 Although this question presented in his petition is framed as one of
    law—“[w]hether a state court that considers the evidence presented at
    a petitioner’s penalty phase proceeding as determinative of the peti-
    tioner’s claim of mental retardation under Atkins v. Virginia, 
    536 U.S. 304
    (2002), has based its decision on an unreasonable determination of
    the facts under 
    28 U.S. C
    . §2254(d)(2),” Pet. for Cert. i—Brumfield
    reframed his question at oral argument as purely one based on the
    factual determinations made in his case, Tr. of Oral Arg. 27–28. He
    properly conceded that a court does not necessarily make its decision
    based on an unreasonable determination of the facts when it rejects an
    Atkins claim based on a record developed before Atkins. Tr. of Oral
    Arg. 7–8.
    Cite as: 576 U. S. ____ (2015)           13
    THOMAS, J., dissenting
    has demonstrated impairment based on the record in
    adaptive skills. The doctor testified that he did have
    an anti-social personality or sociopath, and explained
    it as someone with no conscience, and the defendant
    hadn’t carried his burden [of] placing the claim of
    mental retardation at issue.” App. to Pet. for Cert.
    171a–172a.
    That statement contains three factual determinations: (1)
    Brumfield’s IQ was at least 75; (2) Brumfield had not
    demonstrated impairment in adaptive skills; and (3)
    Brumfield has an antisocial personality disorder. Each of
    these facts is amply supported by the state-court record.
    To begin, the record justifies a finding that Brumfield’s
    IQ is 75, if not a bit higher. Dr. Bolter testified, without
    contradiction, that Brumfield scored a 75 on the IQ test he
    administered and that “Dr. Jordan rated [Brumfield’s]
    intelligence just a little higher than I did.” Record 3907.
    Dr. Bolter’s report similarly shows that Brumfield’s test
    results were “lower than estimated by Dr. Jordan in Janu-
    ary of this year,” but it notes that “Dr. Jordan was using a
    screening measure which proves to be less reliable.” 
    Id., at 272.
    The parties dispute whether Dr. Jordan’s report
    was made part of the record, but to the extent it was, it
    confirms Dr. Bolter’s testimony. Although it does not
    specify an IQ score, Dr. Jordan’s report states that Brum-
    field’s “intellectual function is slightly limited but gener-
    ally close to the Average Range” and that a psychological
    test showed him “to be intellectually functioning generally
    in the low Average Range.” App. 428a–429a. Because two
    thirds of all IQs are expected to lie between 85 and 115, a
    fair reading of Dr. Jordan’s statements would suggest an
    IQ score closer to 85. See American Association on Mental
    Retardation, Mental Retardation: Definition, Classifica-
    tion, and Systems of Supports 37 (9th ed. 1992).
    The record likewise supports the state court’s finding
    14                  BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    that Brumfield is not impaired in adaptive skills. Under
    Atkins, the relevant adaptive skill areas are “ ‘communica-
    tion, self-care, home living, social skills, community use,
    self-direction, health and safety, functional academics,
    leisure, and work.’ 
    536 U.S., at 308
    , n. 3. Dr. Bolter
    reported that Brumfield’s speech was “intelligible and
    prosodic” without “evidence of thought derailment,” Rec-
    ord 271, and that his writing appeared “normal,” 
    id., at 273.
    Brumfield lived independently before his arrest,
    often staying with his pregnant girlfriend and had been
    able to maintain a job for approximately three months
    before quitting “because his earnings were better through
    distributing drugs and selling firearms.” 
    Id., at 271.
    Although Brumfield reads at a fourth-grade level and
    spells and performs arithmetic at a sixth-grade level, Dr.
    Bolter concluded that he “has a normal capacity to learn
    and acquire information when given the opportunity for
    repetition.” 
    Id., at 276.
       Finally, the record supports a finding that Brumfield
    has an antisocial personality disorder. Dr. Bolter testified,
    without contradiction, that what manifested in childhood
    as a conduct disorder had developed in adulthood into an
    antisocial personality disorder. He described that disorder
    as “an absence of a conscience” and “the ability to disre-
    gard the rights and feelings of others in favor of what you
    want” without any “sense of compunction or remorse.” 
    Id., at 3909.
    Dr. Guin acknowledged that Dr. Jordan had
    reached a similar diagnosis. Brumfield presented no
    medical evidence disputing it. That the majority disputes
    “[t]he relevance of this diagnosis,” ante, at 14, does not
    make it any less supported by the record.
    Brumfield thus not only has failed to rebut the state
    court’s factual findings by clear and convincing evidence,
    §2254(e)(1), he has failed to show that they were anything
    other than eminently reasonable. Under any fairminded
    application of §2254(d)(2), he would not be entitled to
    Cite as: 576 U. S. ____ (2015)                   15
    THOMAS, J., dissenting
    relief.
    B
    1
    The majority reaches the opposite result with a bit of
    legerdemain, recasting legal determinations as factual
    ones. It contends that the state court erred in denying
    Brumfield’s claim because the evidence Brumfield pre-
    sented “was entirely consistent with intellectual disabil-
    ity” as defined in Louisiana and thus sufficient to entitle
    him to an evidentiary hearing. Ante, at 8–9. That argu-
    ment betrays the legal nature of the majority’s dispute
    with the state court’s decision: The majority does not—
    because it cannot—disagree that each of the state court’s
    factual findings was supported by the record. See ante, at
    9–10 (not disputing Brumfield’s IQ score); ante, at 14 (not
    disputing Brumfield’s diagnosed antisocial personality
    disorder); 
    ibid. (acknowledging that “evidence
    in the rec-
    ord before the state court may have cut against Brum-
    field’s claim of intellectual disability”); ante, at 15 (ac-
    knowledging that “the underlying facts of Brumfield’s
    crime might arguably provide reason to think that Brum-
    field possessed certain adaptive skills”). Instead, the
    majority disagrees with the state court’s conclusion that
    Brumfield had not made a sufficient threshold showing of
    mental retardation to be entitled to an evidentiary hearing
    on his claim. Ante, at 15–16.
    That conclusion, however, is properly characterized as
    one based on the application of law to fact, not on the
    determination of the facts themselves.6 As we have ex-
    ——————
    6 The majority attempts to defend its recharacterization of the inquiry
    on the ground that the State invoked §2254(d)(2). The State invoked
    that provision because that is the basis upon which Brumfield sought
    federal collateral relief. But, Brumfield is not entitled to that relief
    unless he can show that the state court based its decision to deny his
    Atkins claim on unreasonable factual determinations. Rather than
    16                      BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    plained, “The question whether a state court errs in de-
    termining the facts is a different question from whether it
    errs in applying the law.” Rice v. Collins, 
    546 U.S. 333
    ,
    342 (2006). No one can dispute that Brumfield’s IQ score,
    adaptive skills, and antisocial personality disorder are
    facts. By contrast, the question whether Brumfield has
    met the legal standard for relief on, or at least an eviden-
    tiary hearing with regard to, his Atkins claim requires the
    application of law to those facts. See Panetti v. Quarter-
    man, 
    551 U.S. 930
    , 948–952 (2007) (applying §2254(d)(1)
    to conclude that a state court unreasonably applied clearly
    established federal law when it failed to provide a prisoner
    with a competency hearing after he made “ ‘a substantial
    threshold showing of insanity’ ”).7 Indeed, in discussing
    each of these “factual determinations,” the majority turns
    first to state law to determine what showing a prisoner
    must make to qualify as mentally retarded. Ante, at 9, 11
    (citing State v. Williams, 2001–165 (La. 11/1/02), 
    831 So. 2d 835
    ). If the majority’s disagreement with the state
    court’s decision were truly based on “factual determina-
    tions,” it is hard to understand what relevance state law
    would have.
    ——————
    address those determinations, the majority addresses something else
    entirely.
    7 To be sure, the question whether someone is mentally retarded is
    one of fact. But that is not the question at issue in an Atkins claim.
    Atkins held that a category of mentally retarded offenders could not be
    executed consistent with the Eighth Amendment because a national
    consensus had developed against such executions. It acknowledged
    that there was disagreement about how to define mentally retarded
    offenders and clarified that “[n]ot all people who claim to be mentally
    retarded will be so impaired as to fall within the range of mentally
    retarded offenders about whom there is a national 
    consensus.” 536 U.S., at 317
    . Thus, when a prisoner brings an Atkins claim, he bears
    the burden to establish not just the “fact” of his mental retardation,
    but also that he is sufficiently impaired to fall within the category
    of persons identified in Atkins as legally beyond a State’s power to
    execute.
    Cite as: 576 U. S. ____ (2015)                    17
    THOMAS, J., dissenting
    2
    Even on its own terms, the majority’s so-called “factual”
    analysis fails. The majority holds that the record sup-
    ported a finding that Brumfield qualified for a hearing on
    mental retardation under state law. To reiterate, even if
    true, this state-law-based legal analysis cannot overcome
    AEDPA’s bar to relief under §2254(d)(2). To make matters
    worse, the majority gets the state law wrong.
    The Louisiana Supreme Court’s decision in Williams
    instructed state courts to use the statutory standard for
    determining when a pretrial competency hearing is neces-
    sary—when there is “ ‘reasonable ground to doubt the
    defendant’s mental capacity to proceed.’ ” 
    831 So. 2d
    , at
    858, n. 33 (quoting La. Code Crim. Proc. Ann., Art. 643
    (West 2003)).8 It made clear that “reasonable ground to
    doubt” is “not a reference to proof beyond a reasonable
    doubt in the guilt phase of the trial,” 
    831 So. 2d
    , at 858,
    n. 33 (emphasis added),9 and that the burden was on the
    prisoner to bring forward objective evidence to put his
    mental retardation at issue.
    Brumfield’s IQ test score failed to meet the standard for
    significantly subaverage intellectual functioning under
    Louisiana law. As Williams explained, Louisiana statutes
    defined “ ‘significantly subaverage general intellectual
    functioning’ ” as “ ‘more than two standard deviations
    ——————
    8 Itis unclear whether Williams even continued to supply the govern-
    ing state law at the time the state court acted, for the Louisiana Legis-
    lature had established a procedure for adjudicating claims of mental
    retardation in capital cases three months before Brumfield’s hearing.
    See 2003 La. Acts p. 698 (enacting La. Code Crim. Proc. Ann., Art.
    905.5.1 (West Supp. 2015)). Because that law did not specifically
    address the circumstances under which capital defendants would be
    entitled to a hearing on such claims, however, I assume for the sake of
    argument that Williams supplies the applicable state law.
    9 The majority’s persistent characterization of this standard as a “rea-
    sonable doubt” standard is quite misleading. Ante, at 7, 15, 18.
    18                       BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    below the mean for the test of intellectual functioning,’ ”
    and a person with intellectual functioning two standard
    deviations below the mean “would have an IQ of 70 using
    the Wechsler scale.” 
    Id., at 853,
    and n. 26. Accounting for
    the standard error of measurement, Williams explained
    that the requisite IQ could range “from 66 to 74.” 
    Id., at 854
    , n. 26.10 The majority prefers to avoid this language,
    focusing instead on “[t]he sources on which Williams relied
    in defining subaverage intelligence.” Ante, at 9. But the
    way to apply a state court’s decision is to apply what the
    state court said, and, at 75 and higher, Brumfield’s IQ
    scores exceeded the cutoff for significantly subaverage
    general intellectual functioning under that decision.
    Brumfield’s evidence of alleged deficits in adaptive skills
    similarly failed to meet the requisite standards under
    Louisiana law. Williams defined deficits in adaptive skills
    as “ ‘substantial functional limitations in three or more of
    the following areas of major life activity:’ ” (1) self-care, (2)
    understanding and use of language, (3) learning, (4) mobil-
    ity, (5) self-direction, and (6) capacity for independent
    living. 
    831 So. 2d
    , at 853 (quoting then La. Rev. Stat.
    Ann. 28:381(12) (repealed 2005)). The only evidence
    Brumfield presented that is even potentially relevant to
    these factors was evidence of his poor reading skills and
    behavioral problems in school. But, once again, Dr. Bolt-
    er’s report confirmed that he had “a normal capacity to
    learn and acquire information when given the opportunity
    for repetition” and that Brumfield’s behavioral problems
    ——————
    10 Asthe majority points out, the Court in Williams was “using this
    example to illustrate the concept of [the standard error of measure-
    ment],” ante at 10, n. 4, but it was illustrating the standard error of
    measurement as it related to the Louisiana law defining significantly
    subaverage general intellectual functioning as “ ‘more than two stand-
    ard deviations below the mean for the test of intellectual functioning,’ ”
    
    Williams, supra, at 853
    , and n. 26 (quoting then La. Rev. Stat. Ann.
    28:381(42) (repealed 2005)).
    Cite as: 576 U. S. ____ (2015)                  19
    THOMAS, J., dissenting
    were attributable to “a conduct disorder that . . . pro-
    gressed into an antisocial personality disorder.” Record
    276. The majority places special weight on Brumfield’s
    placement in “special education” classes, ante, at 4, 13,
    n. 7, 14, 15, but the record explains that he was placed in
    behavioral disorder classes not because he had a low
    capacity to learn, but because he had a high capacity to
    make trouble, Record 3846–3847.11 The state court could
    reasonably have found that Brumfield had not provided
    evidence of “substantial functional limitations” in any of
    these categories, let alone the three required by state law.
    Absent objective evidence of either significantly subav-
    erage intellectual functioning or deficits in adaptive be-
    havior, Brumfield was not entitled to an evidentiary hear-
    ing under Williams. The majority’s analysis is erroneous:
    It takes a meritless state-law claim, recasts it as two
    factual determinations, and then awards relief, despite
    ample evidence in the record to support each of the state
    court’s actual factual determinations.
    C
    The majority engages in such maneuvering because
    Brumfield argued only that the state court based its deci-
    sion to deny his Atkins claim on an unreasonable determi-
    nation of the facts, §2254(d)(2), not an unreasonable appli-
    cation of clearly established federal law as determined by
    this Court, §2254(d)(1). Brumfield, for his part, presented
    his claim in this way to avoid AEDPA’s additional re-
    strictions on relief for alleged legal errors. As explained
    below, overcoming §2254(d)(1)’s bar based on an alleged
    ——————
    11 The majority places great reliance on the testimony of Dr. Guin,
    who was not a medical doctor, that Brumfield’s “out of control behavior”
    in the classroom, Record 3879, was a function in part of a learning
    disability, ante, at 13. But, Dr. Guin was not qualified to make that
    diagnosis, and she acknowledged that the school had diagnosed him
    only with a behavioral disorder. Record 3882.
    20                   BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    legal error is particularly demanding. Brumfield’s argu-
    ments, even if presented properly as legal ones, would not
    meet the bar.
    Under §2254(d)(1), a federal court may not award relief
    for a claim adjudicated on the merits in state court unless
    that adjudication “resulted in a decision that was contrary
    to, or involved an unreasonable application of, clearly
    established Federal law, as determined by the Supreme
    Court of the United States.” “Clearly established Federal
    law for purposes of §2254(d)(1) includes only the holdings,
    as opposed to the dicta, of this Court’s decisions.” White v.
    Woodall, 572 U. S. ___, ___ (2014) (slip op., at 3) (internal
    quotation marks and alteration omitted). A state court’s
    decision is therefore not “contrary to” our decisions unless
    its holding contradicts our holdings, or it “ ‘confronts a set
    of facts that are materially indistinguishable from a deci-
    sion of this Court and nevertheless arrives at a result
    different from our precedent.’ ” Mitchell v. Esparza, 
    540 U.S. 12
    , 15–16 (2003) (per curiam). A state court’s deci-
    sion is not “ ‘an unreasonable application’ ” of our decisions
    if it merely “ ‘decline[s] to apply a specific legal rule that
    has not been squarely established by this Court.’ ” Har-
    rington v. Richter, 
    562 U.S. 86
    , 101 (2011). Instead, the
    Court must evaluate the application of our holdings in the
    context of the rule’s specificity: “The more general the
    rule, the more leeway courts have in reaching outcomes in
    case-by-case determinations.” 
    Ibid. (internal quotation mark
    omitted). “[W]here the precise contours of [a] right
    remain unclear, state courts enjoy broad discretion in
    their adjudication of a prisoner’s claims.” 
    Woodall, supra
    ,
    at ___ (slip op., at 9) (internal quotation marks omitted).
    “If this standard is difficult to meet, that is because it
    was meant to be.” 
    Richter, 562 U.S., at 102
    . “ ‘Federal
    habeas review of state convictions . . . disturbs the State’s
    significant interest in repose for concluded litigation,
    denies society the right to punish some admitted offend-
    Cite as: 576 U. S. ____ (2015)            21
    THOMAS, J., dissenting
    ers, and intrudes on state sovereignty to a degree matched
    by few exercises of federal judicial authority.’ ” 
    Id., at 103.
    Although AEDPA “stops short of imposing a complete bar”
    on this type of review, it does require “a state prisoner [to]
    show that the state court’s ruling on the claim being pre-
    sented in federal court was so lacking in justification that
    there was an error well understood and comprehended in
    existing law beyond any possibility for fairminded disa-
    greement.” 
    Id., at 102–103.
    Brumfield cannot meet this
    standard.
    1
    The state court’s decision to deny Brumfield’s Atkins
    claim was not contrary to any holding of this Court. The
    state court recognized that Atkins precludes the execution
    of mentally retarded offenders and then concluded that
    Brumfield did not qualify as a mentally retarded offender.
    Because this Court has never confronted a set of facts that
    are materially indistinguishable from the facts in this case
    and arrived at a different result, the state court’s decision
    was not “contrary to” clearly established federal law as
    determined by this Court.
    Nor is the decision of the state court to deny a hearing
    on the claim contrary to such clearly established law. In
    Atkins, this Court held that the Eighth Amendment pre-
    cludes the execution of mentally retarded offenders, but
    “le[ft] to the States the task of developing appropriate
    ways to enforce the constitutional restrictions upon their
    execution of 
    sentences.” 536 U.S., at 317
    (internal quota-
    tion mark and brackets omitted). This Court did not so
    much as mention an evidentiary hearing, let alone hold
    that prisoners raising Atkins claims are entitled to one.
    To be sure, Atkins cited this Court’s decision in Ford v.
    Wainwright, 
    477 U.S. 399
    (1986), when it explained that
    it was leaving the enforcement of the right to the States.
    
    See 536 U.S., at 316
    –317. Justice Powell’s controlling
    22                  BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    concurrence in Ford required a court to afford a prisoner a
    hearing on the claim that he is insane and therefore ineli-
    gible to be executed after a prisoner made a “substantial
    threshold showing of 
    insanity.” 477 U.S., at 426
    (opinion
    concurring in part and concurring in judgment). The
    citation in Atkins, however, not only was not to that por-
    tion of Ford, it was not even to Justice Powell’s opinion in
    Ford. Compare 
    Atkins, supra, at 317
    (citing 
    Ford, supra, at 405
    (majority opinion), 416–417 (opinion of Marshall,
    J.)), with 
    Ford, supra, at 426
    (opinion of Powell, J.). At-
    kins thus did not imply—let alone hold—that a prisoner is
    entitled to a hearing on an Atkins claim. There being no
    mention of a hearing, the state court’s decision to deny
    Brumfield such a hearing could not be “contrary to . . .
    clearly established Federal law.” §2254(d)(1).
    Even if Atkins did establish a right to an evidentiary
    hearing upon a threshold showing of mental retardation,
    the state court’s decision to deny Brumfield a hearing
    would not be contrary to that rule. After all, the state
    court took the position that Brumfield would have been
    entitled to an evidentiary hearing if he had made a
    threshold showing of mental retardation; it simply con-
    cluded that he had not made that showing. This Court
    has never confronted a set of materially indistinguishable
    facts and found the threshold showing satisfied. Thus, as
    with its rejection of the Atkins claim itself, the state
    court’s decision to deny Brumfield an Atkins hearing was
    not contrary to clearly established federal law as deter-
    mined by this Court.
    2
    The state court’s decision here likewise was not an
    unreasonable application of Atkins. The Atkins Court did
    not clearly define the category “of mentally retarded of-
    fenders about whom there is a national 
    consensus.” 536 U.S., at 317
    . It offered guidance in the form of several
    Cite as: 576 U. S. ____ (2015)            23
    THOMAS, J., dissenting
    clinical definitions of mental retardation as “ ‘subaverage
    intellectual functioning’ ” accompanied by “significant
    limitations in adaptive skills such as communication, self-
    care, and self-direction that became manifest before age
    18.” 
    Id., at 318.
    It gave conflicting indications of the IQ
    score necessary for “subaverage intellectual functioning,”
    defining mild mental retardation as the term used to de-
    scribe “people with an IQ level of 50–55 to approximately
    70,” 
    id., at 308,
    n. 3; and citing one source that reports
    70 or less as the statistical criterion for mental retarda-
    tion, 
    id., at 309,
    n. 5; see 2 Kaplan & Sadock’s Compre-
    hensive Textbook of Psychiatry 2589 (B. Sadock & V.
    Sadock eds., 7th ed. 2000); but commenting that “an IQ
    between 70 and 75 or lower . . . is typically considered the
    cutoff IQ score for the intellectual function prong of the
    mental retardation 
    definition,” 536 U.S., at 309
    , n. 5. It
    offered no greater specificity with respect to “significant
    limitations in adaptive skills,” though it remarked that,
    “by definition,” mentally retarded offenders “have dimin-
    ished capacities to understand and process information, to
    communicate, to abstract from mistakes and learn from
    experience, to engage in logical reasoning, to control im-
    pulses, and to understand the reactions of others.” 
    Id., at 318.
       The state court here reasonably applied the general rule
    announced in Atkins when it rejected Brumfield’s claim.
    Brumfield achieved a 75 on the IQ test administered to
    him by Dr. Bolter, 5 points above the score identified by
    Atkins as the upper end of “ ‘[m]ild’ ” mental retardation,
    
    id., at 308,
    n. 3, and by clinical definitions as the criterion
    for mental retardation. He also scored somewhat higher
    on the IQ tests administered to him by Dr. Jordan. In
    addition, he demonstrated no impairment in adaptive
    skills. To the contrary, his test results “indicate[d] that
    his problem solving, judgment and reasoning skills are
    sufficient to meet the demands of everyday adulthood and
    24                       BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    he is not showing any decrement in the types of problems
    one would assume to see if they were suffering from an
    underlying organic basis or mental illness.” Record 275.
    Based on this record, the state court reasonably concluded
    that Brumfield had not come forward with evidence that
    he fell within the category of mentally retarded offenders
    about whom a national consensus against execution had
    developed.
    For the same reasons, even if one were to mischaracter-
    ize Atkins as clearly establishing a right to an evidentiary
    hearing upon a substantial threshold showing of mental
    retardation, the state court did not unreasonably apply
    that rule. Atkins did not define the showing necessary,
    and the state court reasonably concluded that, on this
    record, Brumfield had not met it.12
    D
    In sum, §2254(d) bars Brumfield’s Atkins claim. The
    facts upon which the state court rejected his claim are
    amply supported by the record and thus not unreasonable.
    In concluding otherwise, the majority conflates questions
    of fact with questions about the application of law to fact.
    That conflation may help it get around the inconveniences
    of “clearly established Federal law as determined by th[is
    Court],” §2254(d)(1), but it does violence to the statute and
    to our ordinary understanding of “facts.” Indeed, we have
    summarily reversed lower courts for making that same
    error. See, e.g., Lopez v. Smith, 574 U. S. ___, ___ (2014)
    ——————
    12 It is worth reiterating that the majority’s analysis of state law
    would afford no basis for relief under §2254(d)(1), even if Brumfield had
    requested relief under that provision. Section 2254(d)(1) serves as a
    basis for relief only when a state court reached a decision that involved
    an “unreasonable application of . . . clearly established Federal law, as
    determined by [this] Court.” (Emphasis added.) And even if Brumfield
    could show a violation of state law, which he cannot for the reasons I
    discussed above, such a violation would “provide no basis for federal
    habeas relief.” Estelle v. McGuire, 
    502 U.S. 62
    , 68, n. 2. (1991).
    Cite as: 576 U. S. ____ (2015)           25
    THOMAS, J., dissenting
    (per curiam) (slip op., at 8) (“Although the Ninth Circuit
    claimed its disagreement with the state court was factual
    in nature, in reality its grant of relief was based on a legal
    conclusion about the adequacy of the notice provided”).
    We should hold ourselves to the same standard.
    IV
    The majority’s willingness to afford relief on Brumfield’s
    first ground of alleged error in the state court’s dismissal
    of his Atkins claim obviates its need to resolve his second,
    which focuses on the state court’s denial of funding to
    develop that claim.      Because I would conclude that
    AEDPA bars relief on the first ground, I must also address
    the second. AEDPA’s standards make short work of that
    ground as well.
    The state court’s denial of funding to Brumfield was
    neither contrary to, nor an unreasonable application of,
    clearly established federal law as determined by this
    Court. No precedent of this Court addresses whether and
    under what circumstances a state prisoner must be af-
    forded funds to develop an Atkins claim. Atkins left “to the
    States the task of developing appropriate ways to enforce
    the constitutional restriction upon their execution of sen-
    
    tences.” 536 U.S., at 317
    (internal quotation marks and
    brackets omitted). None of our decisions since Atkins have
    even purported to address constitutional requirements for
    funding of these claims.
    Brumfield believes that the decision was contrary to,
    and involved an unreasonable application of Ake v. Okla-
    homa, 
    470 U.S. 68
    (1985), and Ford v. Wainwright, 
    477 U.S. 399
    , but neither of those decisions even involved
    protections for mentally retarded offenders. Instead, both
    decisions addressed protections for prisoners asserting
    insanity—Ake in the context of insanity as a defense to a
    
    crime, 470 U.S., at 70
    , 77, and Ford in the context of
    insanity as a limitation on the State’s power to execute a
    26                  BRUMFIELD v. CAIN
    THOMAS, J., dissenting
    
    prisoner, 477 U.S., at 418
    (Powell, J., concurring in part
    and concurring in judgment). Neither involved the ques-
    tion whether a prisoner is entitled to funds to develop an
    insanity claim before he has made a substantial threshold
    showing of that claim. Only Ake addressed the question of
    funds at all, and it held that an indigent defendant has a
    right of “access” to a competent psychiatrist to assist in
    the preparation of his insanity defense, not that an “indi-
    gent defendant has a constitutional right to choose a
    psychiatrist of his personal liking or to receive funds to
    hire his 
    own.” 470 U.S., at 83
    .
    The state court fully complied with this Court’s deci-
    sions when it declined to award Brumfield funds. Brum-
    field did not meet his burden to make a substantial
    threshold showing of mental retardation. No decision of
    this Court requires a State to afford a defendant funds to
    do so.
    *     *    *
    Over 20 years ago, Brumfield deprived the people of
    Baton Rouge of one of their police officers and six children
    of their mother. A jury of his peers found Brumfield guilty
    of the crime and sentenced him to death. The Louisiana
    courts afforded him full appellate and collateral-review
    proceedings.
    Today, the majority tosses those proceedings aside,
    concluding that the state court based its decision to deny
    Brumfield’s Atkins claim on an “unreasonable determina-
    tion of the facts,” even as it concedes that the record in-
    cludes evidence supporting that court’s factual findings.
    Under AEDPA, that concession should bar relief for Brum-
    field. In concluding otherwise, the majority distorts fed-
    eral law and intrudes upon Louisiana’s sovereign right to
    enforce its criminal laws and its courts’ judgments. Such
    willfulness is disheartening.
    What is perhaps more disheartening than the majority’s
    Cite as: 576 U. S. ____ (2015)         27
    THOMAS, J., dissenting
    disregard for both AEDPA and our precedents is its disre-
    gard for the human cost of its decision. It spares not a
    thought for the 20 years of judicial proceedings that its
    decision so casually extends. It spares no more than a
    sentence to describe the crime for which a Louisiana jury
    sentenced Brumfield to death. It barely spares the two
    words necessary to identify Brumfield’s victim, Betty
    Smothers, by name. She and her family—not to mention
    our legal system—deserve better.
    I respectfully dissent.
    28                BRUMFIELD v. CAIN
    THOMAS
    Appendix     , J., dissenting
    to opinion   of THOMAS, J.
    APPENDIX
    W. Dunn & D. Yaeger, Running for My Life: My Journey
    in the Game of Football and Beyond (2008).
    Cite as: 576 U. S. ____ (2015)            1
    ALITO, J., dissenting
    SUPREME COURT OF THE UNITED STATES
    _________________
    No. 13–1433
    _________________
    KEVAN BRUMFIELD, PETITIONER v.
    BURL CAIN, WARDEN
    ON WRIT OF CERTIORARI TO THE UNITED STATES COURT OF
    APPEALS FOR THE FIFTH CIRCUIT
    [June 18, 2015]
    JUSTICE ALITO, with whom THE CHIEF JUSTICE joins,
    dissenting.
    I join all but Part I–C of JUSTICE THOMAS’ dissent. The
    story recounted in that Part is inspiring and will serve a
    very beneficial purpose if widely read, but I do not want to
    suggest that it is essential to the legal analysis in this
    case.