OPINION OF THE COURT
A jury in the District of New Jersey convicted William Harris of being a felon in possession of a firearm in violation of 18 U.S.C. §§ 922(g)(1) and 924(a)(2). Harris now appeals from that conviction, claiming he was denied a fair trial because (1) he was improperly cross-examined by the government about the credibility of police witnesses, (2) the prosecutor improperly vouched for the credibility of government witnesses during summation, and (3) the District Court did not permit him to question a witness about testimony in an unrelated criminal case that may have shown a particular racial bias on the part of the witness. We have jurisdiction pursuant to 28 U.S.C. § 1291 and will affirm.
I.
On May 8, 2003, officers of the Newark Police Auto Theft Task Force approached Harris while he was in his car and arrest
At trial, after police witnesses and Harris gave incongruous testimony, the prosecutor cross-examined Harris about whether police witnesses had lied. As part of her cross-examination, the prosecutor restated various assertions of police witnesses that directly contradicted Harris’ testimony and then asked Harris if it was his testimony that the police witnesses were lying. For example, the prosecutor asked, “Mr. Harris, it’s your testimony that when Detective Walker told this jury that you were holding a gun in your hand that night, he was lying?” Harris’ App. at 147A. 1 At no time during this examination did Harris object to these questions.
After cross-examining Harris, the prosecutor made the following statement during her summation: “So it’s the defendant’s theory, as you heard, that it’s a big conspiracy ... that this gun just appeared, this statement was fabricated, this statement was forged ... and that then these officers came into federal court, each one of them, with a collective 37 years of experience in the Newark Police Department, and they put all that on the line to come in and tell you something the defendant says wasn’t true.” Harris’ App. at 208A (emphasis added). Although Harris now claims this statement improperly bolstered the credibility of police witnesses, at no time during the prosecutor’s summation did Harris object.
Just before trial, the District Court made a preliminary ruling with respect to a motion in limine filed by the government. The motion sought to prevent Harris from questioning one of the police officers involved in Harris’ arrest about an unrelated criminal case in which the officer’s testimony may have shown a bias against Hispanics. The District Court, in granting the government’s motion, explained that the African-American officer’s alleged bias against Hispanics was not relevant in Harris’ case because Harris is not Hispanic (he is African-American) and because such bias would not be relevant to the officer’s credibility. After this preliminary ruling, Harris did not seek to admit evidence of the arresting officer’s alleged bias.
II.
A. Prosecutor’s Questions to Harris About Police Witness Credibility
Harris first claims that the prosecutor improperly influenced the jury’s determi
Under plain error review, we may grant relief if (1) the District Court committed an “error,” (2) the error is “plain,” and (3) the error “affect[s] substantial rights.”
United States v. Olano,
Of the federal courts of appeals that have examined the propriety of questions posed to a criminal defendant about the credibility of government witnesses, it appears nearly all find that such questions are improper.
See United States v. Thomas,
However, despite their disapproval, courts of appeals generally have not reversed a conviction solely because such questions were posed unless opposing counsel specifically objected to them.
Compare Thomas,
Today, we follow our sister circuits and hold that asking one witness whether another is lying is inappropriate. Such questions invade the province of the jury and force a witness to testify as to something he cannot know, i.e., whether another is intentionally seeking to mislead the tribunal. In addition, as Harris’ counsel explained during oral argument, such questions force defendants into choosing to either undermine their own testimony or essentially accuse another witness of being a liar.
Although we find the District Court erred in permitting the prosecutor to ask Harris whether police witnesses had lied, we find the error was not “plain.” The Supreme Court has never ruled on the propriety of these questions, and, until now, neither had this Court in a precedential opinion. Furthermore, it is not likely that such questions, standing alone and without objection, would have “affected the outcome of the district court proceedings.”
Olano,
B. Alleged Vouching by Prosecutor
Harris also alleges the prosecutor im-permissibly vouched for the credibility of police witnesses by indicating in her summation that they would be jeopardizing their careers if they were to lie in court. Because Harris did not object to the alleged vouching at trial, we review this claim under the plain error standard.
See United States v. Brennan,
As the Supreme Court explained in
United States v. Young,
“a criminal conviction is not to be lightly overturned on the basis of a prosecutor’s comments standing alone, for the statements or conduct must be viewed in context; only by so doing can it be determined whether the prosecutor’s conduct affected the fairness of the trial.”
When viewed in the context of the entire summation, the prosecutor’s statement in this case was isolated and made in response to Harris’ allegations that the police forged his signature on a confession
C. District Court’s Ruling That Excluded Evidence of Alleged Racial Bias
Finally, in a supplemental brief, 3 Harris claims the District Court’s decision to prevent him from questioning an arresting officer about an alleged racial bias violated his rights under the Confrontation Clause. Harris asserts we should review his claim de novo. In contrast, the government argues Harris did not preserve this issue for appellate review and, as a result, we should review it for plain error.
The law on this point is clear: “[A] party who unsuccessfully opposes an
in limine
motion to exclude certain evidence can appeal that ruling without an offer of proof at trial if the district court was fully informed and made a pretrial ruling with no suggestion that it would reconsider that ruling at trial. Concomitantly, where a district court makes a tentative
in limine
ruling excluding evidence, the exclusion of that evidence may only be challenged on appeal if the aggrieved party attempts to offer such evidence at trial.”
Walden v. Georgia-Pacific Corp.,
The District Court in this case made a “preliminary ruling” with respect to the government’s motion in limine at the outset of the case. Specifically, the District Court Judge stated, “my preliminary ruling will be that you’re not going to get into it.” Gov’t App. at 103. After this ruling, Harris did not attempt to offer evidence of the officer’s bias at trial. For this reason, we will apply the plain error standard. 4
District courts retain “ ‘wide latitude insofar as the Confrontation Clause is concerned to impose reasonable limits on ... cross-examination based on concerns about, among other things, harassment, prejudice, confusion of the issues, the witness’ safety, or interrogation that is repetitive or only marginally relevant.’ ”
United States v. Mussare,
We agree with the District Court’s conclusion and find no plain error. Assuming the officer held a bias against Hispanics, it is not at all apparent how such a bias would factor into the officer’s decision to stop or testify against an African-American. Furthermore, given the District Court’s wide latitude in these matters, we find that excluding evidence of the alleged bias was well within the District Court’s discretion.
III.
For the foregoing reasons, we will affirm the District Court’s Order of judgment and conviction.
Notes
. Other similar questions to which Harris now objects include the following: (1) "So it’s your testimony, then, that Officer O’Connor, when he came to court and explained how he typed everything, he said, he — that he was lying?” Harris’ App. at 123A. (2) "And it's your testimony that Sergeant Ferreira, when he testified and said how he showed your statement to you, he was lying?” Harris’ App. at 123A. (3) "And it’s your testimony that when he described how you were taking the gun from your front waistband and putting it on the floor of your car, he was lying?” Harris’ App. at 147A-148A. (4) "It’s your testimony that Officer O'Connor just made that up?” Harris’ App. at 163A. (5) "Sir, it's your testimony that Sergeant Ferreira was lying to this jury when he said that he asked you if you swore to the contents of the form?” Harris’ App. at 177A. (6) "And how about when Officer O'Connor said that you signed this statement, that he saw you sign the statement, was he lying?” Harris' App. at 177A. (7) "So when Officer O'Connor said that you signed the form and he saw you sign the form, he was lying?” Harris' App. at 177A.
. See generally McCormick on Evidence § 43 n. 8 (6th ed.2006) (explaining why it is usually impermissible to ask one witness about another witness' credibility).
. The supplemental brief was filed by counsel and raised an issue Harris attempted to present in a
pro se
brief. Local Appellate Rule 31.3 prohibits the filing of
pro se
supplemental briefs except in cases in which counsel plans to withdraw under
Anders v. California,
. Concluding that the District Court's ruling was final and, as a result, applying the abuse of discretion standard would not change our decision with respect to this claim.
