Opinion for the Court filed by Circuit Judge BROWN.
The government charged appellee Sor-enson O. Oruche with one count of conspiracy to possess (with intent to distribute) and to distribute heroin,
see
21 U.S.C. § 846; four counts of heroin distribution,
see id.
§ 841; and four counts of interstate travel in aid of racketeering (“ITAR”),
see
18 U.S.C. § 1952. The jury convicted Oruche on the conspiracy count, on three of the heroin-distribution counts, and on one of the ITAR counts. The jury failed to reach a verdict as to the remaining counts. Subsequently, the district court granted Oruche’s motion for a new trial as to all his convictions, finding
Brady
violations,
see Brady v. Maryland,
I
In summarizing the trial evidence, we focus on the counts that resulted in convictions. Count one, the conspiracy count, was based primarily on evidence offered in support of the other counts. In support of count two (ITAR), Tequila Williams and Alvin Ogar testified about a trip they took with Oruche on September 17, 2000, from Washington, D.C. to New York City. Williams drove Oruche’s rented Jaguar to an apartment where Oruche obtained a baseball-sized package of heroin. He called Williams into the bedroom and directed her to put the heroin in her purse. Williams did so. Meanwhile, Ogar waited in the living room. Oruche, Williams, and Ogar spent about twenty minutes at the apartment and then drove back to D.C., leaving around 11:00 p.m. On the way back, Oruche told Williams he would “take the beef’ if they got pulled over by police. They arrived in the District early in the morning on September 18, 2000, and Oruche drove to several locations, trying to arrange a meeting with someone named “Aaron.” After Oruche met with Aaron, he told Williams and Ogar that Aaron would have killed him if they had not been present.
*593 Count three was a heroin distribution count. Williams and undercover police officer Robert Arrington testified about this transaction. Officer Arrington arranged to buy an ounce of heroin from Williams. On September 21, 2000, Arrington met Williams in a parldng lot and negotiated a price for the heroin. Williams said she was “waiting for her man” and would be able to complete the transaction at 3:00 p.m. the same day at a strip club in the District where Williams worked as a bartender. Williams left the parking lot and called Oruche, who told her he was on his way. Officer Arrington arrived at the club at 2:45 p.m. and met with Williams who told him to wait in his car. A short time later, Oruche arrived in a Jaguar, went inside the club, and gave Williams the heroin. Williams walked out of the club, got into Officer Arrington’s car, and sold him 24.1 grams of heroin for $4,000. Oruche left the club, and Williams later went to his hotel and gave him the money from the sale. As corroborating evidence, the prosecution presented audio and video recordings of Arrington conversing with Williams. In addition, video recordings showed Oruche entering the club at 3:09 p.m., Williams coming out at 3:18 p.m. to meet with Arrington, Oruche coming out at 3:22 p.m. and driving away, and Williams driving away at 3:26 p.m. Evidence of cell-phone usage also confirmed several calls between Williams and Oruche on the day of the transaction, including calls at 12:05 p.m., 12:08 p.m., 12:35 p.m., 2:11 p.m., 2:17 p.m., 2:53 p.m., 3:28 p.m., and 3:45 p.m.
Count five was another heroin distribution count. David Marley, a paid government informant with a significant criminal record, and Special Agent Mark Ross from the Drug Enforcement Administration (DEA) both testified. Marley became associated with Oruche; Oruche trusted him because they were both African. In May 2001, Oruche solicited Marley to sell heroin for him. Oruche said he did not want to deal in amounts less than one hundred grams, which he would sell for $11,000. Marley contacted Special Agent Ross, and he and Ross began setting up heroin purchases. On June 12, 2001, Marley met Oruche in Oruche’s vehicle, while Ross watched from a distance. Oruche gave Marley 176 grams of heroin and told Marley he wanted $16,000 in return. After Oruche left, Ross picked up Marley and took the heroin. Three days later, Marley went to Oruche’s apartment and gave him $6,000 in pre-recorded DEA funds, as a partial payment toward the $16,000 purchase price. During this visit, Marley saw five one-hundred-gram “balls” of heroin lying on Oruche’s bed. On June 26, 2001 and July 3, 2001, Special Agent Ross met directly with Oruche, paying him first $6,000 and then $4,000 in pre-recorded DEA funds, thereby satisfying the $16,000 debt owing from the June 12th transaction. As corroborating evidence in relation to this count, the prosecution presented tape recordings of conversations between Marley and Oruche.
Count nine was a third heroin distribution count. Marley and Special Agent Ross testified. On July 16, 2001, Marley went to Oruche’s apartment and received a portion of a sweater into which “straws” containing a significant amount of heroin had been interwoven with the sweater yarn. Oruche asked Marley to extract the heroin from the sweater. Marley took the sweater and gave it to DEA officials who later determined it contained 212.9 grams of heroin (about half a pound). Marley and Oruche also discussed the removal of the heroin over the telephone, and this telephone call was recorded. Later the same day, Special Agent Ross called Oruche, and in a three-way telephone conversation between Ross, Oruche, and Mar *594 ley, Ross told Oruche he wanted to buy two-hundred grams of heroin. Oruche agreed to make the sale. That evening, law-enforcement agents arrested Oruche at a rental car office near Union Station.
As noted, these counts resulted in convictions. On August 22, 2003, about a year after the convictions, the district court conducted a
“Kastigar
hearing” to determine whether the government had derived any of its evidence from an allegedly involuntary police interview with Oruche.
Cf. Kastigar v. United States,
On December 2, 2003, the defense filed a motion for a new trial based on Brady and the Jencks Act, asserting Williams’s cross-examination could have been much more effective if the defense had known about Williams’s possible second source for heroin. This argument gained additional support from an irregularity in Detective Lyles’s testimony at the Kastigar hearing. Lyles first testified Tungy was in fact a heroin dealer, and Oruche and Tungy “had a shop off of Upshur Street.” When asked whether Tungy sold heroin, Lyles answered: “With ‘O,’ yes, sir.” Six months later, Lyles changed her testimony, submitting a sworn affidavit to the court, explaining Tungy was a cocaine dealer, not a heroin dealer, and claiming she had testified incorrectly in this regard because she was mistaken. Detective Lyles also testified about this mistake in hearings held before the judge who presided at Oruche’s trial.
The Brady /Jencks Act motion remained unresolved on December 14, 2004, when the government informed the district court it had discovered additional impeachment evidence regarding Tequila Williams. Specifically, the government eventually produced a transcript of testimony Williams gave to a grand jury concerning a former boyfriend’s possible involvement in a murder. In this testimony, Williams implicated the boyfriend in the murder and admitted she had previously lied to police in an effort to protect the boyfriend. She testified: “[My boyfriend] told me not to [tell the truth], and he used to abuse me, so I thought that he’d probably beat me up or something.” The government also produced notes of Williams’s earlier statements to the police, in which Williams denied the boyfriend’s involvement.
*595 After receiving these additional documents, the defense renewed its request for a new trial based on Brady and the Jencks Act, arguing the additional impeachment evidence would have allowed the defense to characterize Williams as an admitted liar. In addition, the defense moved to dismiss the indictment with prejudice due to prosecutorial misconduct.
On May 17, 2005, the district court granted the motion for a new trial. The court stated the failure to disclose the documents “significantly impaired defense counsel’s ability to investigate new leads, to further impeach the credibility of a principal prosecution witness, Tequila Williams, and to make additional powerful arguments to the jury.” The court found Detective Lyles’s testimony “contradictory, evasive, oftentimes hostile” and declined to give it any credit. The court also ■suggested Lyles recently had prepared the second page of her notes from the Williams debriefing in a fraudulent effort to bolster her changed testimony. The court did not engage in any detailed analysis of how the defense might have used the impeachment evidence at trial or how the prosecution might have responded; rather, the court simply stated: “Since this Court cannot conclude that Oruche’s trial was fair, this Court will grant his motion for a new trial, substantially for the reasons advanced by defense counsel and to avoid a miscarriage of justice.” The government sought reconsideration, arguing the undisclosed evidence was not material and would not have affected the verdict, but the district court denied reconsideration, repeating that the failure to disclose the documents “significantly impaired defense counsel’s ability to further impeach the credibility of a princip[al] witness and to make powerful arguments to the jury.” The court also denied the motion to dismiss the indictment.
The government brought this appeal pursuant to 18 U.S.C. § 3731.
II
Generally, this court reviews the district court’s grant of a new trial for abuse of discretion. See
United States v. Hall,
*596
On review, then, the question is not whether the district court properly exercised its discretion to order a new trial, but whether the court properly found a
Brady
violation. This distinction makes a
Brady
ruling different from other new trial rulings, because “whether the government has breached its obligations under
Brady
is a question of law,” subject to de novo review.
In re Sealed Case No. 99-3096 (Brady
Obligations),
We review de novo the district court’s finding that the Jencks Act applies,
United States v. Williams-Davis,
Oruche argues we should review the district court’s decision for abuse of discretion because the court granted the new trial “for the reasons advanced by defense counsel and to avoid a miscarriage of justice.” Oruche reads the district court’s order as a broad finding of unfairness in the trial due to “improper conduct, evasive and incredible testimony, and suppression of material evidence,” and therefore he cites non
-Brady,
non-Jencks Act cases emphasizing the wide discretion the trial court has to grant a new trial.
See United States v. Williams,
Ill
Generally speaking, the Supreme Court’s holding in
Brady v. Maryland
requires the government to disclose, upon request, material evidence favorable to a criminal defendant, including evidence held by law enforcement officials.
Our inquiry is confined to a determination of whether there is a reasonable probability that, had the evidence been disclosed to the defense, the result of the proceeding would have been different. The Supreme Court has emphasized that the question is not whether the defendant would more likely than not have received a different verdict *597 with the evidence, but whether in its absence he received a fair trial, understood as a trial resulting in a verdict worthy of confidence. Therefore, our focus is on the potential impact that the undisclosed evidence might have had on the fairness of the proceedings rather than on the overall strength of the government’s case. Evidence is material if the undisclosed information could have substantially affected the efforts of defense counsel to impeach the witness, thereby calling into question the fairness of the ultimate verdict.
Cuffie,
The Jencks Act imposes obligations on the government that are distinct from the government’s Brady obligations, but they may overlap to some extent. The Jencks Act requires the prosecution in a federal criminal case to disclose “statements” of all prosecution witnesses. The Jencks Act provides, in relevant part, as follows:
(b) After a witness called by the United States has testified oji direct examination, the court shall, on motion of the defendant, order the United States to produce any statement (as hereinafter defined) of the witness in the possession of the United States which relates to the subject matter as to which the witness has testified....
(e) The term “statement” means—
(1) a written statement made by said witness and signed or otherwise adopted or approved by him; [or]
(2) a stenographic, mechanical, electrical, or other recording, or a transcription thereof, which is a substantially verbatim recital of an oral statement made by said witness and recorded contemporaneously with the making of such oral statement ....
18 U.S.C. § 3500.
Under the definition in subparagraph (e), notes of a conversation are not generally Jencks Act material (unless they represent a full transcription),
Norinsberg Corp. v. U.S. Dep’t of Agric.,
IV
? the outset, we find that any lost opportunity to impeach Tequila Williams could not possibly have affected the verdicts on counts five and nine (as to which Williams did not testify). Oruche argues these convictions are tainted because of a spillover effect from the convictions on counts two and three, where Williams was a key witness. Oruche points out in this regard that the prosecution had argued against severance of these counts, claiming all the counts were part of a common scheme. The two considerations (severance and Brady materiality) are so different, however, that the asserted inconsistency in the government’s argument disappears. It may have been quite appropriate to deny severance based on the relationship between the various counts; nevertheless, that relationship is not so great that the convictions on counts five and nine are placed in doubt simply because testimony on other counts is challenged.
Counts one, two, and three pose a somewhat more serious question. Count one is the conspiracy count, and we cannot know *598 whether the jury based its conspiracy finding on Williams’s testimony. Count two is the ITAR count arising from Oruche’s New York trip, and Williams was an important witness. As to either of these counts, if the undisclosed impeachment evidence discredited Williams’s testimony, perhaps the fairness of the verdict might be questioned. On count three, Oruche’s argument is even stronger. Not only did Williams testify about the sale to Officer Arrington on September 21, 2000, but the impeachment evidence arguably supports Oruche’s claim that Williams had another source (besides Oruche) for the heroin she sold. Thus, the resolution of this case can be divided into two issues: (1) the question of Williams’s credibility in the eyes of the jury, and (2) the possibility Williams had an alternative source for heroin.
A
As regards Williams’s credibility in the eyes of the jury — an issue that might impact count one, two, or three — we first consider the government’s failure to disclose Detective Lyles’s notes (including Williams’s jottings on those notes). The notes taken by Lyles are not Jencks Act material (because they are not a full transcription of Williams’s statement),
Norinsberg,
We next consider the government’s failure to disclose the grand jury testimony in which Williams admitted she had lied to police in 1993 to protect her boyfriend. The transcript of this testimony (though a full transcription) is not Jencks Act material, because it does not “relate[ ] to the subject matter” of Williams’s testimony in the Oruche case.
Id.
§ 3500(b). The grand jury transcript, however, could certainly have been used to impeach Williams’s credibility. The transcript (and related notes) show that, nine years before Oruche’s trial, Williams had lied to police in order to protect her boyfriend. Defense counsel could have used this evidence to support a claim that Williams was a liar who would say whatever suited her purposes in the moment, even when speaking with authority figures about a matter of grave importance. Nevertheless, given the “reasonable probability” standard articulated by the Supreme Court for
Brady
claims,
Kyles,
Williams was thoroughly impeached at trial. The defense cross-examined her about her work in a strip club, her use of PCP, her prior felony convictions, and the benefits she was receiving in exchange for her testimony. She also admitted to the jury that she had lied in the past, and she admitted to using an alias on her plea agreement.
See Cuffie,
B
Oruche argues he could have used Detective Lyles’s notes to suggest Tun-gy — allegedly Williams’s second supplier— was the real source of the heroin Williams sold to Officer Arrington on September 21, 2000, thereby casting doubt on the count-three conviction. Here, Oruche is on weak ground. Oruche has no solid evidence tending to show Williams had any other source for heroin. The only evidence in this regard is Detective Lyles’s notes, which include a very ambiguous reference to “Tungy.” If, however, the government had disclosed these notes before trial, and if Oruche, on cross-examination of Williams, had attempted to implicate Tun-gy, Williams would likely have denied Tun-gy was her source, and the defense would have had nothing with which to discredit that denial.
Cf. United States v. Bowie,
The district court declined to credit Lyles’s claim of error, and its finding in that regard is entitled to deference,
Founding Church of Scientology,
Finally, as noted, the evidence implicating Oruche as the source of the heroin Williams sold Officer Arrington is very strong. Williams set up the deal with Arrington to occur at 3:00 p.m. at the club. Cell-phone records show a series of telephone calls between Williams and Oruche on that same day, with several calls shortly before and after 3:00 p.m. Moreover, the video recording shows Oruche entering the club minutes before the heroin sale and exiting the club minutes after the sale. This evidence strongly suggests Oruche, not Tungy, was the supplier of the heroin.
In sum, the government’s failure to disclose Detective Lyles’s notes and the grand jury transcript (as well as the related police notes from 1993) did not affect the outcome of Oruche’s trial or call into question the fairness of the verdict, and therefore these documents were not material for purposes of
Brady. Kyles,
V
We reverse the district court’s new trial order. As noted, Oruche based his new trial motion on several asserted irregularities in the trial, but the district court’s ruling focused primarily on Brady and the Jencks Act. The court stated: “As to other defense motions, those motions are denied in view of the grant of the new trial.” The court was not specific as to the substance of the defense motions it was leaving unaddressed, but we consider it appropriate under the circumstances to remand for further proceedings consistent with this opinion.
So ordered.
Notes
. Notwithstanding the government’s repeated concession to the contrary at oral argument, we do not believe the notations satisfy the Jencks Act's definition of a "statement.” The Jencks Act defines a "statement” subject to disclosure as "a written statement made by [a testifying] witness
and
signed or otherwise adopted or approved by him.” 18 U.S.C. § 3500(e)(1) (emphasis added). The government believes “[t]he notations actually written by Williams” meet this definition. Appellant’s Br. at 57. Yet the notations — assuming Williams’s brief written identification of "O,” O’s "Girlfriend (Leslie)” and their cell phone numbers constitute "statement[s]” — are not accompanied by Williams's signature or any other indication of her adoption thereof.
See
Appx. 15 at 1. The government’s interpretation therefore rests on the assumption that, by merely making the notations, Williams also "signed or otherwise adopted or approved” them. 18 U.S.C. § 3500(e)(1). That interpretation, however, renders redundant the Jencks Act's requirement that a testifying witness provide both a written statement "and” a signature or other affirmation of that statement.
Id.
Because "statutory language should be construed so as to avoid redundancy,”
Parker v. Califano,
