. Petitioner Charles Murdoch appeals the denial of his petition for a writ of habeas corpus pursuant to 28 U.S.C. § 2254. Murdoch challenges the district court’s decision that the California trial court’s attorney-client privilege ruling, which barred him from seeing or using a purportedly exculpatory letter written by a government witness to the witness’s lawyer, did not deprive him of his constitutional right to cross-examination guaranteed by the Sixth Amendment’s Confrontation Clause.
We have jurisdiction pursuant to 28 U.S.C. § 2253. We vacate the order of the district court denying Murdoch’s petition, and remand the ease for further proceedings consistent with this opinion.
I
Standard of Review
We review the district court’s denial of Murdoch’s § 2254 habeas petition de novo.
Bribiesca v. Galaza,
II
Background
■ Petitioner Charles Murdoch is currently serving a life sentence without possibility *701 of parole in the California penal system for convictions of first degree murder and attempted murder. The convictions are based upon • a murder which occurred in 1988 while four, people were committing a robbery in the Horseshoe Bar in Long Beach, California: One bystander was shot and killed; another was stabbed and wounded. After an initially fruitless investigation, the case was designated an unsolved crime. The investigation remained dormant until 1994, when .the Long Beach Police Department had acquired the necessary technology to access a previously inaccessible central fingerprint database and ran the prints on file in this case. That led to the identification of Dino Dinardo as one of the robbers. The Horseshoe’s bartender, Dyanne Spence, then tentatively identified Dinardo, and he was arrested in June 1994.
When first questioned by a police detective, Dinardo denied any involvement in the incident. Under pressure from the police, however, he then recanted, admitted to his involvement in the robbery, and identified Charles Murdoch, the petitioner, as one of his accomplices. The District Attorney eventually charged both Dinardo and Murdoch with murder accompanied by special circumstances, crimes carrying possible sentences of life imprisonment without parole.
Dinardo was tried by himself and convicted by a jury of first-degree murder and sentenced to twenty-five years to life.. At Dinardo’s sentencing, however, the sentencing judge suggested that his sentence might be subsequently reduced if he cooperated and testified against Murdoch. Dinardo took the hint and agreed to testify against Murdoch in return for a reduction of his conviction to voluntary manslaughter with a sentence of twelve years.
At Murdoch’s trial, Dinardo testified that on the day of the robbery, Murdoch came by his house with an unidentified Mexican-American man Dinardo did not know and asked if Dinardo wanted to make some money by doing “a job,” which he understood to mean committing a holdup: Dipardo was to grab the money out of the till while the others, who would be armed with a gun and a knife, kept watch. Another unidentified Mexican-American man was driving the car they rode in to the bar. Murdoch entered the bar armed with a .22 caliber rifle and announced the robbery. Dinardo jumped across the bar and took two hundred dollars out.of the register, at which time he heard a shot. He left through the back door and they all divided the money. Dinardo testified that he did not know anyone was hurt until he was questioned by the investigators in 1994.
In addition to Dinardo, witnesses from the bar also testified, including bartender Spence. After Murdoch’s arrest in 1994, Spence identified him in a line-úp, but she and others had been unable positively to identify Murdoch in photo arrays eleven years earlier, on the heels of the robbery. The record strongly suggests that without Dinardo’s accomplice testimony, the prosecution’s case against Murdoch was weak.
Murdoch used Dinardo’s reduced sentence and lesser conviction to impeach him, but here’s the rub. Prior to opening statements, the prosecutor informed the trial court and defense counsel she had discovered the existence of a letter, apparently written by Dinardo to his attorney, in which Dinardo allegedly exonerated Murdoch and claimed that his own statements to the contrary had been coerced by the police. The prosecutor claimed never to have possessed or actually seen the letter. She knew of its existence only through an interview with Dinardo. The letter, it turned out, was in the possession of Dinar-do’s attorney, who asserted on Dinardo’s *702 behalf that it was protected by the attorney-client privilege. The trial court took possession of the letter without allowing Murdoch’s counsel or the prosecutor to see it and ruled after reading it that Dinardo was entitled to the privilege. The. court did so without mention of the constitutional guarantee now at issue. After so ruling, the court returned the letter to Dinardo’s attorney and ordered that he safekeep it in case of appeal.
On direct appeal, and in his petitions for state post conviction and federal habeas relief, Murdoch raised, inter alia, his claim that the trial court’s failure to allow him to see or use the privileged letter violated his right to confrontation. The California Court of Appeal denied relief, and the California Supreme Court declined his petition for review. Petitioner’s federal ha-beas petition was 'denied by the district court. This circuit granted a Certificate of Appealability limited to the issue of “whether; appellant’s federal constitutional rights were violated when the trial court ruled that prosecution witness Dinardo’s' letter was protected by attorney-client privilege.”
Ill
Discussion
The Sixth Amendment guarantees Murdoch the right “to be confronted with the witnesses against him.” U.S. Const, amend. VI. “[T]he right of confrontation ‘contributes to the establishment of a system of criminal justice in which the perception as well as the reality of fairness prevails.’”
Coy v. Iowa,
One longstanding purpose of cross examination is to expose to the fact-finder relevant and discrediting information “revealing ... ulterior motives of the witness as they may relate directly to issues or personalities in the case at hand,” motives that cast doubt on the honesty of the witness’s testimony.
Davis,
At least two circuits have acknowledged and applied this precept in the context of the attorney-client privilege.
United States v. Rainone,
*704
Generally, the Confrontation Clause requires that a defendant be given an opportunity for effective cross-examination.
Olden,
*705
“[A] criminal defendant states a violation of the Confrontation Clause by-showing that he was prohibited from engaging in otherwise appropriate cross-examination designed to show a prototypical form of bias on the part of the witness, and thereby ‘to expose to the jury the facts from which jurors ... could appropriately draw inferences relating to the reliability of the witness.’ ”
Olden,
If the purported contents of Dinardo’s privileged letter are as generally described by the prosecutor and as Murdoch believes, then, as in
Van Arsdall,
Murdoch has arguably met his burden: “[a] reasonable jury might have received a significantly different impression of [Dinardo’s] credibility had [Murdoch’s] counsel been permitted to pursue his proposed line of cross-examination.”
Under the AEDPA, federal courts will' usually not disturb the findings and conclusions of a state court on federal constitutional issues in state post-conviction proceedings. 28 U.S.C. § 2254(d), (e). Here, however, we do so because the petitioner was unable adequately to develop the factual predicate for his claim in state court.
See
28 U.S.C. § 2254(e)(2)(A)(ii);.
cf. Killia
n
v. Poole,
During trial and later in the state habeas proceedings, Murdoch tried to make the letter a part of the record. The trial court observed the letter in camera, but then refused Murdoch’s request that a sealed copy of the letter be made part of the record and simply let Dinardo’s counsel safekeep it, all on the ground that the content of. the letter was privileged. The California Court of Appeal denied Murdoch’s motion to have the letter unsealed, and nothing in ■ the record indicates that the letter was. examined by that court. The court makes no indication in its opinion that the letter was examined and the privilege then weighed in light of Murdoch’s right to effective cross examination. In federal habeas court, Murdoch moved the court to permit discovery of the letter, again to no avail. Thus, despite petitioner’s *706 'diligence, the letter was never made a part of the record.
Without knowing the contents of the letter, or seeing 'any evidence that the contents were examined by the state courts during Murdoch’s post-conviction relief proceedings, the federal courts are not able to determine whether or not the California Court of Appeal’s decision “was contrary.to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States; or (2) resulted in a decision that was based on an unreasonable determination of facts in light of the evidence presented in the State court proceeding.” 28 U.S.C. § 2254(d). Similarly, without the letter, we are unable to determine in the first instance whether, in this case, the attorney-client privilege “must fall before the right of petitioner to seek out the truth in the process of defending himself.”
Davis,
We now vacate-the district court’s denial of Murdoch’s § 2254 petition, and remand this ease to the district court. We instruct the district court to use its process to obtain the- letter. Once the letter is obtained, . the district court shall then determine-in camera and as the court deems appropriate whether, as applied to the totality of facts in this case, the denial of access to Dinardo’s letter resulted in an unconstitutional denial of Murdoch’s Sixth Amendment right to confront witnesses.
VACATED and REMANDED.
Notes
. Murdoch spends a good portion of his brief addressing the merits of the privilege ruling under California law, an issue that is not before us. "We are not a state supreme court of errors; we do not review questions of state evidence law. On federal habeas we may only consider whether the petitioner’s conviction violated constitutional norms.”
Jammal v. Van de Kamp,
. We note that, Confrontation Clause aside, attorney-client privilege does not extend to perpetrating a fraud against the court.
See Nix v. Whiteside,
Additionally, as the Eleventh Circuit recently recognized, invocation of the attorney-client privilege to bar "the introduction' of crucial evidence that would [] significantly undermine[ ] the credibility of [ ] the Government’s key witnesses” can be especially unfair to defendants whose accomplices turn state’s evidence.
United States v. Almeida,
. An issue raised by the facts but not by the petitioner is whether a prosecutor faced with the possibility of questionable testimony would be well advised to pursue waiver of the privilege by a cooperating government witness.
Cf. Brady v. Maryland,
We leave resolution of this issue to another day.
