Silva v. Woodford ( 2005 )


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  •                      FOR PUBLICATION
    UNITED STATES COURT OF APPEALS
    FOR THE NINTH CIRCUIT
    BENJAMIN WAI SILVA,                               No. 04-99000
    Petitioner-Appellant,
    v.                                   D.C. No.
    CV-90-03311-DT
    JILL BROWN, Warden,*
    OPINION
    Respondent-Appellee.
    
    Appeal from the United States District Court
    for the Central District of California
    Dickran M. Tevrizian, District Judge, Presiding
    Argued and Submitted
    March 22, 2005—San Francisco, California
    Filed July 26, 2005
    Before: Betty B. Fletcher, Sidney R. Thomas, and
    Kim McLane Wardlaw, Circuit Judges.
    Opinion by Judge B. Fletcher
    *Jill Brown is substituted for her predecessor, Jeanne Woodford, pursu-
    ant to Fed. R. App. P. 43(c)(2).
    8615
    8618                   SILVA v. BROWN
    COUNSEL
    Phillip A. Treviño, Los Angeles, California, argued for the
    petitioner-appellant. With him on the briefs was Michael J.
    Brennan, Manhattan Beach, California.
    Teresa Torreblanca, San Diego, California, argued for the
    respondent-appellee. Robert M. Foster, San Diego, California,
    was on the brief.
    SILVA v. BROWN                    8619
    OPINION
    B. FLETCHER, Circuit Judge:
    The State of California charged and tried Benjamin Wai
    Silva for two brutal homicides, along with kidnaping, rob-
    bery, and gun offenses, but did not disclose to the defense that
    the plea agreement that secured the testimony of the prosecu-
    tion’s star witness, Norman Thomas, required Thomas not to
    undergo a psychiatric evaluation before testifying. As a result,
    the jury never learned of the considerable question as to
    Thomas’s competence to testify or of the secret deal the Las-
    sen County District Attorney made to ensure that question
    remained unanswered until after Silva was tried. At issue in
    this appeal is whether the failure to disclose that deal was
    Brady error. We conclude that it was.
    I.   BACKGROUND
    Silva’s case is before us for the second time. On our first
    consideration of the case, we remanded for the district court
    to determine whether there was Brady error: was there a deal
    such as Silva alleged; if so, did the prosecutor conceal it; and
    if he did, were the deal and its concealment material under
    Brady? Silva v. Woodford, 
    279 F.3d 825
    , 855 (9th Cir. 2002)
    (“Silva I”). The district court found that there was a deal and
    that it was not disclosed, but found that these facts were
    immaterial to Silva’s conviction. It is this judgment that Silva
    now appeals.
    As the facts and procedural background are amply summa-
    rized in our prior disposition, we excerpt from that summary
    as relevant to the issues before us here and add additional
    details as necessary.
    Silva stands convicted of the gruesome abduction,
    robbery and murder of [Kevin] Thorpe in Madeline,
    California. Thorpe and his girlfriend, Laura Craig,
    8620                   SILVA v. BROWN
    were college students returning from winter break
    when they passed through Madeline on their way to
    Oregon. On January 11, 1981, Silva and two accom-
    plices, Joe Shelton and Norman Thomas, kidnaped
    Thorpe and Craig after spotting the couple at a fill-
    ing station in town. The three men forced the couple
    to drive to Shelton’s property and proceeded to take
    their cash and belongings. Thorpe was then chained
    to a tree while Craig was taken inside a cabin and
    repeatedly sexually assaulted.
    
    Id. at 828.
    Thorpe was subsequently shot and killed. Thomas, by his
    own admission, then dismembered Thorpe’s body with an axe
    and buried the remains in shallow graves. Craig was later shot
    and killed by the side of a road.
    Thomas informed police of the murders later that
    month after being found in possession of a firearm
    in violation of his probation. In exchange for turning
    state’s evidence, murder charges against Thomas
    were dropped. He was eventually sentenced to
    eleven years and four months imprisonment for par-
    ticipating in the kidnaping, being an accessory after
    the fact to murder, burglary, and use of a firearm.
    Shelton’s trial took place before Silva’s. He was
    convicted of murdering both Thorpe and Craig and
    sentenced to life without parole. On direct appeal, he
    was resentenced to life imprisonment.
    Because of publicity, Silva’s trial was held in San
    Bernardino County in January 1982. When called to
    testify at Silva’s trial, Shelton invoked his Fifth
    Amendment privilege against self-incrimination. The
    primary evidence regarding Silva’s role in Thorpe’s
    death came from Thomas. Thomas testified that both
    SILVA v. BROWN                       8621
    Silva and Shelton left the cabin in the morning after
    the kidnapings, and that Thorpe was murdered while
    Thomas was having consensual sex with Craig.
    According to Thomas, Silva then returned to the
    cabin and forced Thomas to dismember and dispose
    of Thorpe’s body. Subsequently, the three men were
    standing over a barrel in which some of Thorpe’s
    belongings were being burned, when Shelton alleg-
    edly proceeded to describe to Thomas how Thorpe
    had died. Shelton related how he and Silva had
    unlocked the chain linking Thorpe to the tree and led
    him terrified and crying up the side of a hill. After
    leaving briefly to obtain a weapon, Silva then
    walked up behind Thorpe and shot him up and down
    his body at close range, using an Ingram M-11 .38
    caliber fully automatic pistol equipped with a
    silencer. Silva then gave the weapon to Shelton, who
    emptied the rest of the magazine clip into Thorpe’s
    body. According to Thomas, Silva simply looked on
    and smiled as Shelton described the slaying to
    Thomas.
    Thomas also testified that several days after
    Craig’s disappearance, a similar conversation took
    place while the three were gathered on the porch of
    the cabin, in which Shelton described how Craig had
    been shot and killed. Once again, Silva allegedly
    looked on and smiled while Shelton spoke to
    Thomas.
    At the conclusion of the guilt phase, the jury
    deliberated for two days before finding Silva guilty
    of first-degree murder in the shooting death of
    Thorpe. However, the jury found Silva not guilty of
    Craig’s murder. The jury also found Silva guilty of
    kidnaping and robbing both victims, as well as ille-
    gally possessing a machine gun and a silencer.
    8622                    SILVA v. BROWN
    
    Id. at 828-29.
    At the penalty phase, the jury returned a verdict of death.
    Silva also received two life sentences for the two kidnaping
    convictions, along with a variety of lesser sentences for the
    other convictions. On direct appeal, the state courts substan-
    tially affirmed the verdict and the death sentence. After two
    state habeas petitions were summarily denied, Silva filed a
    federal habeas petition in 1990 and a second amended petition
    in 1993.
    One of Silva’s claims on federal habeas is that the prosecu-
    tion violated his due process rights under Brady v. Maryland,
    
    373 U.S. 83
    (1963), by failing to disclose to the defense that
    the prosecution’s deal with its chief witness Norman Thomas
    had required that Thomas, who had several years earlier been
    involved in a motorcycle accident and suffered severe brain
    damage, not undergo a psychiatric evaluation before testifying
    against Silva. Silva also claimed, among other things, that he
    had received ineffective assistance of counsel at the guilt and
    penalty phases of his trial. In 1999, the district court denied
    Silva’s petition in its entirety.
    On appeal, we affirmed the district court in part, reversed
    in part, and remanded. We held that relief should be granted
    on Silva’s ineffective assistance claim with regard to the pen-
    alty phase, but we rejected Silva’s claims of ineffective assis-
    tance with regard to the guilt phase. Silva 
    I, 279 F.3d at 855
    .
    With respect to the Brady claim, we determined that Norman
    Thomas’s credibility was “a critical issue, given that he was
    the only witness who could identify Silva as the trigger man
    in Thorpe’s murder.” 
    Id. at 854-55.
    Had the prosecution’s
    deal prohibiting a psychiatric examination of Thomas been
    presented to the jury, we concluded, the very fact of the deal
    (if true) “could by itself have undermined Thomas’s credibili-
    ty” by making the jury aware of “the potentially devastating
    fact that the state itself doubted Thomas’s mental competen-
    cy.” 
    Id. at 855.
    We therefore remanded the case for an eviden-
    SILVA v. BROWN                      8623
    tiary hearing as to the veracity of Silva’s allegations regarding
    the prosecution’s secret deal with Norman Thomas. In accor-
    dance with our disposition of Silva’s penalty phase ineffective
    assistance claim, we ordered that Silva be resentenced follow-
    ing the exhaustion of the current habeas petition. 
    Id. at 856.
    On remand to the district court, Silva’s allegations regard-
    ing the undisclosed deal were established as true. Thomas’s
    attorney, Rex Gay, stated in his declaration that at the time of
    Thomas’s arraignment, he had imminent plans to have
    Thomas psychiatrically evaluated, because he believed
    Thomas “was either unable to cooperate in his own defense,
    or insane.” Gay made his plans known to the district attorney,
    who agreed with Gay that Thomas’s testimony would be nec-
    essary to convict Silva (and Shelton), and that having Thomas
    psychiatrically evaluated would “supply ammunition to the
    defense.” Gay and the district attorney then struck a bargain
    under which Thomas would not be psychiatrically examined,
    and in return the district attorney would drop the murder
    charges in exchange for Thomas’s testimony.
    Silva’s trial counsel, Thomas Buckwalter, stated in his dec-
    laration that, during his representation of Silva, he was never
    informed of Thomas’s agreement to refrain from undergoing
    a psychiatric evaluation; Buckwalter did not learn of the
    agreement until after the trial ended. As the state submitted no
    evidence contradicting the Gay and Buckwalter declarations,
    the district court found that the evidence
    compels a finding that the prosecutor reached an
    agreement with Thomas prior to Silva’s trial accord-
    ing to which Thomas would refrain from being psy-
    chiatrically examined and would testify at Silva’s
    trial, in exchange for not being charged with murder
    and receiving a total sentence of not more than
    eleven years and four months . . . . [T]he aspect of
    the agreement concerning postponing any psychiat-
    8624                     SILVA v. BROWN
    ric examination of Thomas was neither revealed to
    the defense nor disclosed to the jury.
    The district court nonetheless rejected Silva’s Brady claim.
    First, the district court found that Thomas’s testimony had
    already been adequately called into question on cross-
    examination because Thomas had told the jury he would be
    receiving a reduced sentence in exchange for his testimony,
    then admitted on cross-examination that murder charges could
    still be filed against him if he did not cooperate and that Shel-
    ton had told him to place all the blame on Silva. According
    to the district court, the jury’s decision to acquit Silva for the
    murder of Laura Craig — in spite of Thomas’s testimony
    implicating Silva for her murder as well as Kevin Thorpe’s —
    “demonstrates that the jury did not accept all of Thomas’s tes-
    timony at face value, but considered it only to the extent that
    it was corroborated by other evidence at trial.” The district
    court noted the evidence corroborating significant portions of
    Thomas’s story: in particular, the authorities found body parts
    and evidence of the kidnaping where Thomas said they would
    be, and Silva’s fingerprints were found on ammunition in a
    trailer on the Shelton property. Finally, the district court
    found that Silva’s vague and equivocating statements to the
    police after his arrest provided additional evidence of his
    guilt. For these reasons, the district court concluded that the
    prosecution’s failure to disclose its agreement regarding the
    psychiatric examination of Thomas was not material under
    Brady. The district court therefore denied relief on this claim.
    II.    JURISDICTION AND STANDARDS OF REVIEW
    This habeas petition was filed before the effective date of
    the Antiterrorism and Effective Death Penalty Act of 1996
    (“AEDPA”). Silva 
    I, 279 F.3d at 830
    , 831 n.5. A certificate
    of appealability is required for this appeal, but Silva’s case is
    in all other respects governed by pre-AEDPA law. 
    Id. at 831
    & n.5; accord, Hayes v. Brown, 
    399 F.3d 972
    , 978 (9th Cir.
    2005) (en banc). Under pre-AEDPA standards, “state court
    SILVA v. BROWN                      8625
    judgments of conviction and sentence carry a presumption of
    finality and legality and may be set aside only when a state
    prisoner carries his burden of proving that his detention vio-
    lates the fundamental liberties of the person, safeguarded
    against state action by the Federal Constitution.” 
    Hayes, 399 F.3d at 978
    (citation and alteration omitted).
    The district court having issued a certificate of appeala-
    bility, we have jurisdiction under 28 U.S.C. § 2253.
    We review Brady claims de novo. United States v. Blanco,
    
    392 F.3d 382
    , 387 (9th Cir. 2004).
    III.   ANALYSIS
    [1] The government violates its constitutional duty to dis-
    close material exculpatory evidence where (1) the evidence in
    question is favorable to the accused in that it is exculpatory
    or impeachment evidence, (2) the government willfully or
    inadvertently suppresses this evidence, and (3) prejudice
    ensues from the suppression (i.e., the evidence is “material”).
    See Banks v. Dretke, 
    540 U.S. 668
    , 691 (2004); Strickler v.
    Greene, 
    527 U.S. 263
    , 281-82 (1999); Kyles v. Whitley, 
    514 U.S. 419
    , 433 (1995). Evidence is material for Brady pur-
    poses “if there is a reasonable probability that, had the evi-
    dence been disclosed to the defense, the result of the
    proceeding would have been different.” 
    Kyles, 514 U.S. at 433
    (citations and internal quotation marks omitted); see also
    
    Banks, 540 U.S. at 699
    ; 
    Strickler, 527 U.S. at 280
    .
    [2] In applying the materiality standard, the Supreme Court
    has explained that “[t]he question is not whether the defen-
    dant would more likely than not have received a different ver-
    dict with the evidence, but whether in its absence he received
    a fair trial, understood as a trial resulting in a verdict worthy
    of confidence.” 
    Kyles, 514 U.S. at 434
    . Thus materiality does
    not require a showing that the defendant would have been
    acquitted had the suppressed evidence been disclosed, or that
    8626                         SILVA v. BROWN
    disclosure of the suppressed evidence would have reduced the
    quantum of inculpatory evidence below that required to con-
    vict the defendant. 
    Id. at 434-35
    (stressing that materiality “is
    not a sufficiency of evidence test”). Rather, a Brady violation
    is established where “the favorable evidence could reasonably
    be taken to put the whole case in such a different light as to
    undermine confidence in the verdict.” 
    Id. at 435.
    Once the materiality of the suppressed evidence is estab-
    lished, no further harmless error analysis is necessary, even in
    the context of habeas review: when the government has sup-
    pressed material evidence favorable to the defendant, the con-
    viction must be set aside. 
    Kyles, 514 U.S. at 435-36
    ; 
    Hayes, 399 F.3d at 984-85
    .1
    [3] In Silva’s case, the first two Brady elements — that the
    evidence is favorable to the accused and that it has been sup-
    pressed by the government — have been established. The dis-
    trict court found (and the State does not dispute) that the
    prosecution made a deal requiring that its witness Norman
    Thomas refrain from undergoing a psychiatric evaluation
    before testifying against Silva. The existence of this deal evi-
    dencing the prosecution’s concern as to the mental state of
    Thomas was obviously impeachment evidence favorable to
    the defense. The deal was never disclosed to the defense. The
    only question the parties debate is whether it was material.
    We answer this question in the affirmative. “We cannot
    overemphasize the importance of allowing a full and fair
    1
    Although Hayes addressed claims that the prosecution violated due
    process by using and by failing to correct false evidence, 
    Hayes, 399 F.3d at 978
    (citing Napue v. Illinois, 
    360 U.S. 264
    (1959), and Alcorta v. Texas,
    
    355 U.S. 28
    (1957)), rather than by failing to disclose material exculpatory
    evidence to the defense, Hayes is relevant to Silva’s case because the same
    materiality analysis applies to these types of claims. See 
    id. at 985
    (noting
    that the materiality standard of United States v. Agurs, 
    427 U.S. 97
    (1976),
    a forerunner of Kyles, applies to Napue claims); 
    id. at 988
    (referring to the
    “Napue/Alcorta/Agurs materiality standard”).
    SILVA v. BROWN                      8627
    cross-examination of government witnesses whose testimony
    is important to the outcome of the case.” Silva 
    I, 279 F.3d at 854
    (quoting United States v. Brooke, 
    4 F.3d 1480
    , 1489 (9th
    Cir. 1993)). Had the full extent of the prosecution’s deal with
    Norman Thomas been disclosed to the defense, a full cross-
    examination of this critical witness would have revealed that
    even the prosecution viewed Thomas’s testimony with some
    doubt. The existence of the deal would have put Thomas in
    a different light for the jury. The legitimate question whether
    Thomas was competent, or perhaps insane, creates, in our
    minds, a reasonable probability of a different result. In the
    absence of disclosure of Thomas’s questionable mental state
    to the defense and the jury, the guilty verdict returned on the
    murder charge is not one worthy of our confidence.
    [4] We begin with an examination of Norman Thomas’s
    role in Silva’s trial. Impeachment evidence is especially likely
    to be material when it impugns the testimony of a witness
    who is critical to the prosecution’s case. See, e.g., 
    Banks, 540 U.S. at 700
    (holding that impeachment evidence was material
    where it pertained to a witness whose testimony was “crucial
    to the prosecution” and was in the prosecution’s own judg-
    ment “of the utmost significance”); Carriger v. Stewart, 
    132 F.3d 463
    , 480 (9th Cir. 1997) (en banc) (holding that
    impeachment evidence was material where it pertained to “the
    prosecution’s star witness”); see also East v. Johnson, 
    123 F.3d 235
    , 239 (5th Cir. 1997) (“[W]hen the withheld evidence
    would seriously undermine the testimony of a key witness on
    an essential issue or there is no strong corroboration, the with-
    held evidence has been found to be material.” (emphasis
    added) (citation and internal quotation marks omitted)).
    [5] The testimony of Norman Thomas was crucial to the
    state’s prosecution of Silva for murder. Though other evi-
    dence at trial confirmed Silva’s involvement in the abduction
    of Thorpe and Craig and suggested Silva’s recognition of his
    own guilt, Norman Thomas was — as both this court and the
    district court have previously recognized — the only witness
    8628                       SILVA v. BROWN
    who provided an account of how Thorpe’s murder took place
    and the only witness who identified Silva as his killer. Silva
    
    I, 279 F.3d at 852
    , 854-55; see also Silva v. Calderon, No. CV
    90-3311 DT, slip op. at 10 (C.D. Cal. Jan. 27, 1999) (prior
    opinion of the district court, affirmed in part and reversed in
    part in Silva I) (“The most devastating evidence against Silva
    was Thomas’s testimony informing the jury of the two tales
    told by Shelton and Silva’s contemporaneous smile.”). Thom-
    as’s testimony as to Joe Shelton’s account of the events and
    Silva’s damning response is uncorroborated anywhere else in
    the record. Without Thomas, the prosecution had no evidence
    of how — or by whom — Thorpe was killed.
    Thomas’s testimony was not only the prosecution’s most
    specific evidence about the murder; it was also the most pow-
    erful. Silva’s “adoptive admission” of Shelton’s account of
    Thorpe’s murder was tantamount to a confession. “As the
    Supreme Court has observed: ‘A confession is like no other
    evidence. Indeed, the defendant’s own confession is probably
    the most probative and damaging evidence that can be admit-
    ted against him.’ ” 
    Hayes, 399 F.3d at 986
    (quoting Arizona
    v. Fulminante, 
    499 U.S. 279
    , 296 (1991)) (further citation and
    internal quotation marks omitted). Thus Thomas’s account of
    the exchange between Silva and Shelton was in more than one
    respect the crux of the prosecution’s case against Silva for
    Thorpe’s murder. See Silva 
    I, 279 F.3d at 852
    , 854-55. It fol-
    lows that Thomas’s credibility was “a critical issue.” 
    Id. at 854.2
    [6] Had the prosecution’s deal foreclosing a psychiatric
    examination of Thomas been revealed, it could have had a
    profound effect on the jury’s assessment of Thomas’s testi-
    2
    Given the centrality of Thomas’s testimony to the prosecution’s mur-
    der case, the state’s heavy reliance on Strickler v. Greene is misplaced.
    “The witness whose impeachment was at issue in Strickler gave testimony
    that was in the main cumulative, and hardly significant” to the predicate
    facts of the offense. 
    Banks, 540 U.S. at 700
    (citation omitted). The same
    cannot be said of Norman Thomas, without whose testimony the state
    would have had no evidence that Silva killed Thorpe.
    SILVA v. BROWN                     8629
    mony. As we have previously recognized, evidence that calls
    into question a witness’s competence to testify is powerful
    impeachment material. See, e.g., Benn v. Lambert, 
    283 F.3d 1040
    , 1054, 1056 (9th Cir. 2002) (holding that undisclosed
    evidence of a crucial government witness’s drug use during
    the defendant’s trial was material because it would “reflect on
    [that witness’s] competence and credibility as a witness”);
    United States v. Service Deli, Inc., 
    151 F.3d 938
    , 942-44 (9th
    Cir. 1998) (holding that a set of handwritten notes taken by
    a government attorney during an interview with the govern-
    ment’s key witness was material “most significantly” because
    the notes included a statement by the witness that he had sus-
    tained a stroke that affected his memory).
    [7] The fact of the undisclosed deal bears critically and
    directly on Thomas’s “competence and credibility as a wit-
    ness.” See 
    Benn, 283 F.3d at 1056
    . Had the defense known
    that the prosecution had required, as a condition of Thomas’s
    plea bargain, that he agree not to be psychiatrically evaluated
    before testifying, competent defense counsel would have
    ensured that the jury was “made aware of the potentially dev-
    astating fact that the state itself doubted Thomas’s mental
    competency.” Silva 
    I, 279 F.3d at 855
    . As a result, the jury
    might not have believed the most important piece of Thom-
    as’s testimony — his uncorroborated account of Silva’s
    “adoptive admission” — because of concerns about Thomas’s
    capacity clearly to remember who said what to whom.
    Such concerns would have been exacerbated by other evi-
    dence in the record that competent counsel would have
    brought out on cross-examination in connection with the
    question of Thomas’s competence. In particular, Thomas’s
    trial testimony that he was in the cabin with Laura Craig when
    Thorpe was killed is in conflict with Thomas’s previous state-
    ment to the DA that he was with Silva when Thorpe was
    killed. Thomas’s several admissions of confusion during his
    direct examination would have assumed greater importance
    and presumably been a subject of emphasis for the defense
    8630                     SILVA v. BROWN
    had the prosecution’s doubts about Thomas’s mental capacity
    been revealed. Finally, the very fact that the prosecution had
    sought to keep evidence of Thomas’s mental capacity away
    from the jury might have diminished the State’s own credibil-
    ity as a presenter of evidence.
    [8] In sum, the fact of the prosecution’s undisclosed deal
    with Thomas, had it been presented to the jury, would have
    put the testimony of this critical witness in a substantially dif-
    ferent light, both directly, by casting doubt on the accuracy of
    Thomas’s testimony, and indirectly, by inducing the defense
    to focus the jury’s attention on Thomas’s lapses and inconsis-
    tencies and by calling into question the prosecutor’s faith in
    the competence of his own witness. With the murder prosecu-
    tion so heavily dependent on Thomas’s testimony, and given
    the powerful effect the revelation of the prosecution’s own
    doubts about its star witness would likely have had on the
    jury, we cannot say that, in the absence of this evidence, Silva
    “received a fair trial, understood as a trial resulting in a ver-
    dict worthy of confidence.” 
    Kyles, 514 U.S. at 434
    .
    According to the district court and the State, the impeach-
    ment of Thomas that actually occurred at trial was sufficient
    to render further impeachment material superfluous. Because
    Thomas testified that he would receive a reduced sentence for
    his testimony, that murder charges could still be filed against
    him if he did not cooperate, and that the co-conspirator Shel-
    ton had told him to place all the blame on Silva, the district
    court concluded that “it is not reasonably probable that such
    additional impeachment evidence [i.e., the undisclosed deal]
    would have made a difference to this jury’s assessment of
    Silva’s guilt.” Along similar lines, the State urges that “since
    the other methods used to impeach Thomas failed, this lesser
    tool [i.e., the undisclosed deal] would also have failed.”
    [9] Our precedent rejects this strained logic. The failure of
    a defendant’s efforts to impeach a witness does not prove that
    additional impeachment would have been ineffectual, or
    SILVA v. BROWN                     8631
    merely cumulative, any more than it supports the opposite
    conclusion. As we explained in Benn v. Lambert, a defen-
    dant’s conviction in spite of his attempt at impeaching a key
    government witness demonstrates only the inadequacy of the
    impeachment material actually presented, not that of the sup-
    pressed impeachment material; in light of the failure of the
    impeachment attempt at trial, the suppressed impeachment
    material may “take[ ] on an even greater 
    importance.” 283 F.3d at 1055
    ; see also Service 
    Deli, 151 F.3d at 944
    (“It
    makes little sense to argue that because [the defendant] tried
    to impeach [the witness] and failed, any further impeachment
    evidence would be useless. It is more likely that [the defen-
    dant] may have failed to impeach [the witness] because the
    most damning impeachment evidence in fact was withheld by
    the government.”).
    In Benn, we held that the evidence of a witness’s drug use
    during trial and history of misconduct was material under
    Brady even though the witness had been impeached at trial by
    questions about his history as a paid informant, his prior con-
    victions, and benefits he received from the state in connection
    with his testimony in the 
    case. 283 F.3d at 1054-56
    . The
    undisclosed evidence, we explained, “would have provided
    the defense with a new and different ground of impeachment”
    than those introduced at trial. 
    Id. at 1056.
    Likewise, in Car-
    riger v. Stewart, we determined that a witness’s long history
    of burglaries and of lying to the police was material notwith-
    standing the jury’s knowledge that the witness in question
    was a burglar testifying with 
    immunity. 132 F.3d at 481-82
    .
    As we stressed there, “the government cannot satisfy its
    Brady obligation to disclose exculpatory evidence by making
    some evidence available and claiming the rest would be
    cumulative. Rather, the government is obligated to disclose
    all material information casting a shadow on a government
    witness’s credibility.” 
    Id. (citation and
    internal quotation
    marks omitted) (emphasis in original).
    In Silva’s case, the undisclosed evidence was not duplica-
    tive of the impeachment evidence actually presented, but
    8632                    SILVA v. BROWN
    rather was of a different kind. It “would have provided the
    defense with a new and different ground of impeachment.”
    
    Benn, 283 F.3d at 1056
    . Thomas’s admissions on cross-
    examination that murder charges could still be filed against
    him and that Shelton had instructed him to blame Silva, could
    cast doubt only on Thomas’s forthrightness, not his compe-
    tence to testify. See Silva 
    I, 279 F.3d at 852
    . The deal regard-
    ing psychiatric evaluation, of course, relates to reliability:
    because of questions as to Thomas’s competence, completely
    apart from motive, was his testimony reliable?
    [10] We are influenced by the potency of the undisclosed
    impeachment material as well as its subject matter. Even
    though the jury heard Thomas admit to being confused sev-
    eral times during his direct examination, a few moments of
    hesitation on the part of a witness recalling year-old events
    pale in comparison to the fact that the party proffering the
    witness harbors such doubts about his competency that it has
    taken affirmative steps to prevent a psychiatric evaluation of
    that witness. Cf. 
    Carriger, 132 F.3d at 481
    (“[A]lthough the
    jury heard [the prosecution’s star witness] Dunbar admit he
    had once slapped his stepdaughter, they heard no evidence of
    Dunbar’s lifelong history of violence.”). The fact of the undis-
    closed deal was not at all cumulative of the impeachment evi-
    dence Silva offered at trial; on the contrary, the fact of the
    prosecution’s secret deal would have raised new and more
    powerful doubts about the reliability of Norman Thomas’s
    testimony.
    [11] The prosecutor’s own conduct in keeping the deal
    secret underscores the deal’s importance. While the govern-
    ment’s Brady obligation exists “irrespective of the good faith
    or bad faith of the prosecution,” 
    Banks, 540 U.S. at 691
    (cita-
    tion and internal quotation marks omitted), we have recog-
    nized that a prosecutor’s assessment of undisclosed evidence
    can support a finding of materiality by highlighting the impor-
    tance of that evidence. For example, in Singh v. Prunty, 
    142 F.3d 1157
    (9th Cir. 1998), we considered the materiality of
    SILVA v. BROWN                      8633
    impeachment evidence the disclosure of which the prosecutor
    conceded would have been “the kiss of death” to the govern-
    ment’s case. 
    Id. at 1163.
    We “deem[ed this] candid conces-
    sion to be highly significant,” because “the prosecutor, more
    than neutral jurists, can better perceive the weakness of the
    state’s case.” 
    Id. The prosecutor’s
    actions can speak as loud as his words.
    Recently, in considering the materiality of a prosecutor’s
    secret agreement to drop felony charges against his star wit-
    ness in a capital murder trial, our en banc court found the
    prosecutor’s furtive conduct highly relevant: “Presumably, the
    importance to the State’s case of [the witness] James’s testi-
    mony is what initially led the prosecution to make the secret
    deal; likewise, the importance to James’s credibility of his
    false testimony regarding the absence of a deal is what led the
    prosecution to endeavor to keep that deal secret.” 
    Hayes, 399 F.3d at 987
    .
    Here, Thomas’s attorney Rex Gay declared in his uncontro-
    verted affidavit that the prosecutor agreed with Gay’s assess-
    ment that a psychiatric evaluation of Thomas could be
    damaging to the State’s case against Silva. The prosecutor
    took his concern one step further, concluding that the very
    fact of the deal regarding Thomas’s psychiatric evaluation
    needed to be concealed from the jury. The State’s deliberate
    and strategic decision to make the deal and not to disclose it
    suggests the weakness of its post hoc claims that the evidence
    was irrelevant.
    The State makes much of the fact that the jury did not find
    Silva guilty of Laura Craig’s murder despite having heard
    Thomas finger Silva as her killer in exactly the same manner
    he implicated Silva in Kevin Thorpe’s death: by relating
    Silva’s reaction to a tale told by Shelton. According to the dis-
    trict court and the State, the fact that the jury acquitted Silva
    on Craig’s murder despite convicting Silva for Thorpe’s mur-
    der demonstrates that the jury credited Thomas’s testimony
    8634                    SILVA v. BROWN
    only where it was corroborated by other evidence. On this
    theory, additional impeachment of Thomas would not have
    shaken the guilty verdict on Thorpe’s murder because the jury
    must have considered Thomas’s story about Thorpe’s death to
    have been corroborated more strongly than Thomas’s story
    about Craig’s death.
    [12] The problem with this interpretation is that Thomas’s
    testimony was the only evidence of Silva’s role in Thorpe’s
    murder. Because Thomas’s account of Thorpe’s death is no
    more strongly corroborated in the record than Thomas’s claim
    that Silva killed Craig, an equally plausible interpretation of
    the split verdict is that the jury entertained some doubts about
    Thomas’s credibility and so did not believe everything
    Thomas told them. If the jury had been presented with evi-
    dence of the prosecution’s own doubts as to Thomas’s mental
    capacity, the jury might not have believed Thomas’s account
    with regard to either murder. Thus the fact that the jury
    acquitted Silva of the Craig murder proves little about the
    materiality of the secret deal to Silva’s conviction for the
    Thorpe murder.
    Finally, the State claims that the undisclosed deal with
    Thomas cannot be deemed material under Brady because it
    would not have been admissible in court. See Wood v. Bar-
    tholomew, 
    516 U.S. 1
    , 6 (1995) (per curiam). The State’s
    premise is simply incorrect. Whether or not it is true (as the
    State claims) that California law would not have allowed
    Silva to force a psychiatric evaluation of Thomas and would
    have protected as attorney work-product the district attorney’s
    doubts about Thomas’s credibility, it is clear that the fact of
    the deal itself would have been admissible to impeach
    Thomas by calling into question his capacity as a witness and
    by illustrating the full extent of the agreement that provided
    a motive for Thomas to testify. See Cal. Evid. Code. § 780(c),
    (f) (“[T]he court or jury may consider in determining the cred-
    ibility of a witness any matter that has any tendency in reason
    to prove or disprove the truthfulness of his testimony at the
    SILVA v. BROWN                     8635
    hearing, including . . . [t]he extent of his capacity to perceive,
    to recollect, or to communicate any matter about which he
    testifies [and] . . . [t]he existence or nonexistence of a bias,
    interest, or other motive. . . .”). The State’s admissibility
    objection under Wood thus dissolves: the fact of the deal
    could have been presented to the jury, and — as our analysis
    has demonstrated — this evidence was material in and of
    itself.
    [13] In sum, because evidence of the undisclosed deal
    could well have undermined the credibility of a vital prosecu-
    tion witness, “there is a reasonable probability that, had the
    evidence been disclosed to the defense, the result of the pro-
    ceeding would have been different.” 
    Kyles, 514 U.S. at 433
    (citations and internal quotation marks omitted). Therefore,
    the prosecution’s secret deal with Thomas was material to
    Silva’s conviction for murder, and the State violated Silva’s
    due process rights by failing to disclose the deal to the
    defense.
    On appeal, Silva understandably focuses on the effect of
    the undisclosed deal on his murder conviction. The strong evi-
    dence in the record corroborating the parts of Thomas’s
    account relevant to the kidnaping, robbery, and firearms
    charges precludes reversal of Silva’s convictions on these
    charges.
    IV.    CONCLUSION
    In our justice system, the prosecuting attorney occupies a
    special position of public trust. Courts, citizens, and even
    criminal defendants must rely on these public servants to be
    honorable advocates both for the community on whose behalf
    they litigate and for the justice system of which they are an
    integral part. When prosecutors betray their solemn obliga-
    tions and abuse the immense power they hold, the fairness of
    our entire system of justice is called into doubt and public
    confidence in it is undermined.
    8636                   SILVA v. BROWN
    The evidence in this case leaves no doubt that Silva was
    involved in the sordid conduct that led to the deaths of Kevin
    Thorpe and Laura Craig. Unfortunately, the reliability of the
    jury’s verdict as to Silva’s role as the triggerman in Thorpe’s
    murder was compromised by the Lassen County District
    Attorney’s unscrupulous decision to keep secret the deal he
    made to prevent an evaluation of the competence of the
    State’s star witness. The particularly atrocious nature of the
    crimes with which Silva was charged cannot diminish the
    prosecutor’s — and our court’s — duty to ensure that all per-
    sons accused of crimes receive due process of law.
    [14] We reverse the judgment of the district court and
    remand with instructions to grant the writ of habeas corpus
    with respect to Silva’s murder conviction, and we reaffirm the
    vacation of his sentence in accordance with our disposition in
    Silva 
    I, 279 F.3d at 856
    . We leave Silva’s convictions on the
    kidnaping, robbery, and firearms charges undisturbed. The
    State shall retry Silva within a reasonable time or resentence
    him based on these remaining convictions.
    REVERSED AND REMANDED WITH INSTRUC-
    TIONS.