Opinion for the Court filed by Circuit Judge MIKVA.
Appellants in this consolidated action appeal their criminal convictions on procedural grounds. Both appellants charge that their sixth amendment right to effective assistance of counsel was violated by the trial court’s order barring defense counsel from discussing the substance of two sealed bench conferences with the defendants. As to individual claims, appellant Eniola challenges the trial court’s denial of his two motions to sever and his two motions for acquittal. Eniola also claims that the security measures used in the courtroom undermined his presumption of innocence and that the trial judge erred in admitting the testimony of one of the government’s chief witnesses. Appellant Bamji challenges the validity of a missing witness instruction and the trial court’s decision to allow the prosecution to recross-examine a defendant without a redirect examination.
The record shows that the trial court prohibited all defense counsel from advising their respective clients that one of the potential witnesses was a government informant. Because this directive inhibited appellant Bamji’s ability to develop a defense of entrapment, we find that his right to effective assistance of counsel was undermined. We therefore reverse and remand appellant Bamji’s case on this ground. Appellant Eniola’s sixth amendment claim fails because he did not present an arguable scenario in which the government informant could have played a role in entrapping him. Therefore, Eniola’s inability to confer with his counsel on the role of the informant is of no constitutional signifi- *385 canee. We find no merit to any of the other claims raised by the appellants.
I. Background
This case involves an undercover operation in which one Detective Hairston of the District of Columbia Police Department arranged to purchase heroin from the appellants. Pursuant to a tip from an informant, Hairston met with appellant Bamji who offered to sell him a kilo of heroin. After various negotiations with Bamji as to price and quantity, Hairston arranged the buy and the appellants, along with three other persons, were arrested.
Trial testimony revealed that the apartment where appellant Bamji first met Detective Hairston belonged to a woman who was present at the time. Bench conferences also revealed that the defense was unable to locate this woman but that the government had access to her. Appellant Bamji requested a “missing witness” instruction to the jury, which the trial court gave; when Bamji complained about the form of the instruction, the court repeated and clarified the instruction to the jury.
On two separate occasions, appellant Eni-ola motioned to sever his case from that of the other defendants. The trial court denied both motions, as well as two separate motions for acquittal made by Eniola.
During the trial, two sealed bench conferences were held before closing argument. The court ordered all defense counsel not to discuss the conferences with their clients. The jury found Bamji guilty of all six counts of the indictment: conspiracy to violate controlled substance laws, distribution, possession with intent to distribute, and three counts of use of a telephone to commit drug violations. Eniola was convicted of conspiracy to possess with intent to distribute. This appeal followed.
II. Analysis
A. The Effect of the Protective Order on Appellants’ Right to Effective Assistance of Counsel
Appellants contend that they were denied their sixth amendment right to effective assistance of counsel when the district court forbade all counsel from discussing with their clients two bench conferences the transcripts of which were placed under seal. Bamji raised this argument in his brief, and counsel for Eniola joined in on this claim at oral argument. Although we generally will not entertain an argument that has not been raised in an appellant’s opening brief,
see McBride v. Merrell Dow and Pharmaceuticals, Inc.,
The focus of both bench conferences was a potential witness’ status as a government informant. The transcripts of the two sealed conferences and the objections raised later in the trial reveal that the trial court’s protective order barred all defense counsel from discussing with their clients not only the woman’s ongoing status as a police informant, but also her past status and role as an informant at the time of the drug transaction. During the bench conferences, counsel for Bamji specifically raised his intention to attempt to develop a defense of entrapment. The evidence established that the initial meeting between Bamji and Detective Hairston took place in the woman’s apartment and that she had played a role in bringing about this meeting. The court concluded that it would not allow discussion of the potential witness’ relationship with the police unless defense counsel proffered some specific evidence, beyond mere phone calls, to show that Bamji had been induced by the woman to enter the drug transaction with Detective Hairston.
Relevant portions of the colloquy are as follows:
MR. OYEWOLE: ... After the [initial contact between the informant and Bam-ji] we will present evidence here that [the informant] and some other people continued to look for Tony Bamji to go ahead and procure the heroin.
Our defense in this case, your honor, is entrapment. Unless you can connect the *386 person who started the entrapment, we would be prejudiced.
% * * ♦ *}c *
THE COURT: All right. Fine.... Come back at 2:00 o’clock, and you can put your witness on, and don’t delve into it. You don’t delve into any relationship between [the informant] and the police department unless you establish in some fashion on your own that this man was overreached by somebody. I don’t have any evidence at all that he was overreached.
* * * * * *
Unless you present some evidence which indicates that you were overreached, you don’t talk about any relationship between anybody and the police department ...
(Emphasis added.) The court applied this protective order to all defense counsel. At no time during the trial did counsel for Eniola attempt to explain to the trial court how and whether he might attempt to show that Eniola was entrapped. The only objection to the protective order raised by Enio-la’s counsel concerned the difficulty it created for him in explaining trial procedures to his client.
MR. BUCKMAN: ... Before lunch you indicated— ... that discussion at the bench before lunch, it was something that we could not discuss with our clients — I just want to put on the record that I have a problem with that because I find it difficult to be able to adequately counsel my client as to his rights in this matter without being able to tell him specifically what has been going on in the last hour.
It is very difficult for counsel to explain to a defendant and to tell him what needs to be done and not done with regard to instructions and closings and to explain what the missing witness instruction is all about in not being able to explain to him our discussion at the bench.
And I renew my request to be able to have that opportunity to explain to my client our bench discussion.
THE COURT: I still admonish you not to do it.
Appellants argue that the court’s order impaired their ability to prepare a defense of entrapment. In
Mudd v. United States,
We believe that no fixed rule with respect to disclosure is justifiable. The problem is one that calls for balancing the public interest in protecting the flow of information against the individual’s right to prepare his defense. Whether a proper balance renders non-disclosure erroneous must depend on the particular circumstances of each case, taking into consideration the crime charged, the possible defenses, the possible significance of the informer’s testimony, and other relevant factors.
Id.
at 62,
In arguing that the informant’s testimonial privilege should override the sixth
*387
amendment concerns implicated in this case, the government relies on several cases of our sister circuits which sanction the use of
in camera
proceedings in applying the
Roviaro
balancing test. In those cases the reviewing court recognized that the trial judge needed to conduct an
in camera
interview of the informant in order to determine whether the informant’s knowledge or role in the criminal transaction was relevant or helpful to the establishment of an asserted defense. Where such relevancy was not established, the trial judge was held not to have abused his discretion in denying disclosure.
See, e.g., United States v. De Los Santos,
Similarly, the government asserts that the trial court in the instant case correctly precluded discussion of the known potential witness’ status as an informant. In essence, the government reasons that because the woman’s name, address, and role as an individual were known to counsel and the defendants, appellants were not precluded from pursuing a trial strategy which would demonstrate to the trial judge the materiality of the fact that the potential witness was an informant. This reasoning ignores the rationale underlying the sixth amendment right to effective assistance of counsel. Unlike the cases offered by the government, which focused on the relevancy of the informant’s role and potential testimony, in this case the trial court’s protective order did not preclude defendants from calling the witness (assuming they could have found her). Instead, the protective order impinged directly on defense counsel’s ability to
confer
with the client on a critical aspect of the defense. As the First Circuit has observed, “utmost candor between an attorney and client is essential to effective assistance of counsel.”
Greater Newburyport Clamshell Alliance v. Public Service Commission of New Hampshire,
As noted, nothing in the record suggests an arguable scenario by which the informant may have played a role in entrapping appellant Eniola. In his closing argument, Eniola’s counsel stressed that Eniola did not enter the conspiracy until the morning of the drug transaction, five days after Bamji initially met Detective Hairston. Any actions by the informant to “get Bamji kicking” took place before Eniola got involved in the conspiracy. Bamji, however, had direct contacts with the informant.
By precluding any discussion with appellant Bamji of the potential witness’ role as an informant at the start of the conspiracy, the trial court directly inhibited defense counsel from discussing strategy and tactics for developing an entrapment defense. The fact that the protective order was limited to the woman’s relationship with the police does not diminish the sixth amendment problem.
See Mudd,
*388
Our ruling does not create an automatic override of the informant’s privilege whenever the defense raises the specter of an entrapment defense. We reach solely the question of when a client and attorney have a constitutionally protected right to confer on the role of an individual as an informant for the police. If, for example, an informant had merely provided a tip to the police without any further involvement in the criminal transaction, the defendant would not have a colorable argument that the informant acted as an agent for the government.
Cf. United States v. Gonzales,
In Bamji’s case we are satisfied that defense counsel raised a legitimate potential defense of entrapment that entitled him to explore this possibility — at least with his client — without the inhibition that might have been caused by the protective order. The informant not only tipped the officer, but the initial meeting between Detective Hairston and Bamji took place in her home while she was present. Although the record is not clear on the specifics of the informant’s role in bringing about this meeting, her role was not so limited as to eliminate the possibility that she acted as an agent.
The right to discuss a matter with the defendant, however, does not necessarily include the right to probe into the matter during testimony. The test of whether such information should be disclosed in open court is governed by the
Roviaro
balancing test, which looks to the degree of an informant’s involvement in the criminal transaction and the ability of an informant’s potential testimony to aid in establishing an asserted defense.
See, e.g., De Los Santos,
*389 B. Eniola’s Severance Claim
Appellant Eniola argues that the trial court erred in denying his motions to sever entered before and during the trial. This court has aptly summarized the law on motions to sever:
The general rule is that the decision to grant a severance is within the sound discretion of the trial judge, whose judgment will not be reviewed absent a clear abuse of discretion.... [This court has] create[d] a presumption that persons jointly indicted should be tried together.... [Cjases are to be severed where necessary to insure a fair trial. Where the essential fairness of a trial is not impaired by a refusal to sever, the incremental burden of duplicating a complex trial or reproducing elusive evidence is a proper consideration in the decision to deny severance.
United States v. Bridgeman,
C. Eniola’s Motion for Acquittal
When reviewing a district court’s denial of a motion for judgment of acquittal, this court “must determine, whether, viewing the evidence most favorably to the government and according the government the benefit of all legitimate inferences therefrom, a reasonable juror
must necessarily
have had a reasonable doubt as to the defendants’ guilt.”
United States v. Weisz,
D. Eniola’s Other Arguments
In his
pro se
briefs, Eniola charges that the security measures in the courtroom undermined his presumption of innocence and that the trial judge erred in allowing Mr. William Harrison’s testimony to be admitted. Because the objection regarding admissibility of Harrison’s testimony was not raised below, we conclude that this objection has been waived.
See United States v. Johnson,
As to the security measures, during the trial two of the four codefendants, Bamji and one Alex Shoga, were denied bail after the court determined that their presence could not otherwise be ensured. As a result, two U.S. marshals were stationed in the courtroom behind Bamji and Shoga, purportedly to prevent their flight. When these two defendants took the stand they were escorted by a marshal who stood to the side of the stand during their testimony. The other marshal took a position on the opposite wall to the side of the judge. No marshal was assigned to attend appellant Eniola. We do not believe that these measures undermined appellant Eniola’s presumption of innocence or prejudiced in any way his right to a fair trial.
See Dorman v. United States,
E. Bamji’s Claim Regarding Prosecution’s Recross Without a Redirect
At trial, during Bamji’s cross-examination by counsel for a codefendant, a new issue arose which had not been covered during direct examination. The court gave all counsel an opportunity to ask further questions. Only the prosecution requested leave to “recross just briefly.” The privilege of recross-examination as to matters not covered on redirect examination lies within the trial court’s discretion. Fed.R. Civ.P. 611(b). The reviewing court will disturb such decisions only for abuse of discretion.
See Geders v. United States,
F. Bamji’s Argument on the Missing Witness Instruction
Equally unmeritorious is Bamji’s claim that the district court gave an inadequate missing witness instruction so as to warrant reversal of his conviction. On review of the transcripts, we have no doubt that the trial court unequivocally articulated to the jury that the potential witness in question was “peculiarly available” to the government, i.e., more available to the government than to the defendants. The jury had heard a substantial amount of testimony that the potential witness occupied the, apartment in which Detective Hairston first received a sample of heroin from Bamji and that she was present at the time. Defense counsel, in their closing arguments, emphasized this person’s absence as a witness, noting the government’s failure to produce her to explain how the conspiracy started. The instruction was sufficiently clear to permit the jury, if it so chose, to draw an inference against the government for the witness’ absence.
III. CONCLUSION
We affirm the district court on all issues raised on appeal with the exception of the protective order restricting discussion of the sealed bench conferences. As to the protective order, we remand only appellant Bamji’s case for the reasons stated. On remand, the district court must allow defense counsel to probe with Bamji the potential witness’ role as an informant at the time of the drug conspiracy. The sixth amendment to the Constitution does not allow an attorney to be walled off from his client when acting in defense of the client’s liberty.
It is so ordered.
