A jury convicted Gerald Jackson and Anthony Rodriguez of possession with intent to distribute cocaine base (Count One), in violation of 21 U.S.C. § 841(a)(1), and using and carrying a firearm during and in relation to a drug trafficking crime (Count Two), in violation of 18 U.S.C. § 924(c)(1). The district court sentenced Jackson to 212 months imprisonment on Count One and 60 months imprisonment on Count Two, to run consecu *649 tively, to be followed by a term of supervised release of five years on Count One and three years on Count Two. The court sentenced Rodriguez to 262 months imprisonment on Count One and imposed an identical sentence to Jackson in all other regards.
On appeal, Rodriguez and Jackson argue that their convictions should be reversed. First, both defendants maintain that the government’s refusal to comply with Fed. R.Crim.P. 16(a)(1)(E) required the exclusion of expert witness testimony. Second, they assert that the trial court denied them the right to confront the witnesses against them by preventing them from questioning a witness about a past act of perjury. Third, they contend that the trial court erred in instructing the jury that a conviction under 18 U.S.C. § 924(c)(1) could be based on constructive possession. Jackson also argues that the district court erroneously failed to exclude certain exhibits whose prejudicial effect outweighed their relevance. Finally, Jackson contends that the evidence was insufficient to convict him on either count. We affirm.
I.
During the evening of September 23,1993, Indianapolis Police Department officers executed a search warrant at а basement apartment at 2216 North College Avenue. The officers entered the apartment, identified themselves as police, and ordered everyone in the apartment to “get down.” Ignoring this command, Jackson walked backwards toward another area of the apartment and reached toward a pile of clothing that lay on the floor. The officers later found a loaded Taurus 9 millimeter handgun under that pile and another handgun nearby. Jackson testified that he was not rеaching for a gun and that he lay on the ground when the officers ordered him to do so.
The officers found Rodriguez in a closed bathroom, to which he had attempted to block the officer’s entry. After securing Rodriguez, one officer retrieved a loaded handgun from on the top of the toilet. During the subsequent search of the apartment, the officers seized: thirty three grams of cocaine, walkie-talkies, and a digital scale from a shelf in a kitchen cabinet; forty nine grams of cocaine base from a closet shelf in the first bedroom; twenty grams of cocaine in a leather pouch found on a closet shelf in the second bedroom; over one gram of cocaine in a jacket on the living room floor; digital pagers on both Jackson and Rodriguez; another pager from the living room floor; and $3,100 cash from Rodriguez and $699 cash from Jackson.
In addition to the cocaine, handguns, and drug paraphernalia, the officers discovered two Western Union receipts bearing Rodriguez’s name in a duffel bag in the second bedroom. Following a reading of his Miranda warnings, Rodriguez gave his address to the officers as 2216 North College Avenue and told them that he paid a monthly rent of $500. Jackson claimed that he lived at a different address. The officers found a receipt in another duffle bag in the second bedroom from Southern California Edison Company with Jackson’s name and a different address on it; Jackson testified that this receipt was found in his wallet. The officers also tеstified that they discovered sets of keys for the apartment on both Rodriguez and Jackson; Jackson denied that he had the keys. At trial the building landlord, Phillip O’Malley, testified that he rented the apartment to both Rodriguez and Jackson. During an interview immediately following the raid, however, the landlord had told police that he rented only to one man and received rent money only from Rodriguez and not from Jackson.
On December 15, 1993, a jury convicted Jackson and Rodriguez of possession with intent to delivеr cocaine in violation of 21 U.S.C. § 841(a)(1), and of using or carrying a firearm during and in relation to a drug trafficking crime, in violation of 18 U.S.C. § 924(c)(1). This appeal followed.
II.
A.
Jackson and Rodriguez first argue that the government’s failure to comply with Fed. R.Crim.P. 16(a)(1)(E) required the exclusion of its proffered expert testimony regarding *650 the drug courier profile. Fed.R.Crim.P. 16(a)(1)(E) states:
At the defendant’s request, the government shall disclose to the defendant a written summary of testimony the government intends to use under Rules 702, 703, or 705 of the Federal Rules of Evidence during its case in chief at trial. This summary must describe the witnesses’ opinions, the bases and the reasons therefor, and the witnesses’ qualifications.
The defendants contend that the government complied with neither the spirit nor the letter of the law, and that this violation permitted allegedly “surprise” testimony that substantially prejudiced their ability to prepare an adequate defense. On November 24, 1993, Jackson’s counsel made a written request for disclosure of expert testimony pursuant to Fed.R.Crim.P. 16(a)(1)(E). 1 On November 29, 1993, the government responded in writing to this request, stating:
In response to your letter of November 24, 1993, please be advised that Officers Paul G. Arkins, Jerry Cheung, and R.J. Kenney may testify at trial concerning the use of beepers, firearms, walkie-talkies, and Western Union wire transfers in connection with the sale of narcotics. In addition, each of these officers may testify that narcotics traffickers often secure locations such as houses or apartments to serve as a base for dealing narcotics. Each of these police officers will base their testimony on their years of training and experience in the area of drug investigations.
On December 3, 1993, Rodriguez filed his 16(a)(1)(E) request for a summary of the government’s expert witness testimony. On December 7, 1993, the government’s written response stated:
In response to your Request for Written Summary of the Government’s Proposed Expert Testimony dated December 3, 1993, please be advised that Officers Em-mit C. Carney, Jerry Cheung, and R.J. Kenney may testify at trial concerning the use of beepers, firearms, walkie-talkies, and Western Union wire transfers in connection with the sale of narcotics. In addition, each of these officers may testify that narcotics traffickers often secure locations such as houses or apartments to serve as a base for dealing narcotics. Each of these police officers will base their testimony on their years of training and experience in the area of drug investigations.
After receiving these responses, which they considerеd inadequate, Jackson and Rodriguez filed motions in limine to prohibit the government from introducing the expert testimony. The district court denied these motions.
At trial, the government sought to introduce Officer R.J. Kenney to testify as to his opinion about what items drug dealing operations commonly use — the so-called “drug courier profile.” Jackson and Rodriguez objected to this testimony, arguing that the government’s disclosure and notice in advance of trial was inadequate under 16(a)(1)(E) and thus required exclusion оf this testimony. Outside the presence of the jury, the government proffered the substance of Kenney’s testimony to the court. The district court overruled the objection 2 and *651 permitted Kenney to testify. 3 Neither Jackson nor Rodriguez sought a continuance to prepare for cross-examination of this expert testimony.
The application of 16(a)(1)(E) is an issue of first impression for this Court. Rule 16(a)(1)(E) mandates that the government provide a written summary of any expert witness testimony, including: (1) the witness’ opinions; (2) the bases and reasons for the opinions; and (3) the qualifications of the experts. We review a district court’s ruling on a Rule 16 motion for an abuse of discretion.
United States v. D’Antoni,
In this case, which involved expert testimony regarding the drug courier profile, the government’s summary 4 in response to the defendants’ requests satisfied — although barely — the requirements of Rule 16. First, the summary “describe[d] the witnesses’ opinions.” It stated that the witnesses “may testify at trial concerning the use of beepers, firearms, walkie-talkies, and Western Union wire transfers in connectiоn with the sale of narcotics.” This statement notified the defendants that the witnesses were of the opinion that certain paraphernalia and profile evidence were frequently linked to the sale of narcotics. Furthermore, the government explained that the witnesses “may testify that narcotics traffickers often secure locations such as houses or apartments to serve as a base for dealing narcotics.” Again, this statement informed the defendants that the witnesses wоuld testify regarding their opinions about the location profile of drug sales.
The government’s statement also sufficiently “describe[d] ... the bases and the reasons” for their opinions, and “the witnesses’ qualifications.” Fed.R.Crim.P. 16(a)(1)(E). The government letter indicated that the officers’ testimony would, in part, be based on the use of beepers, firearms, walk-ie-talkies and wire transfers. Additionally, they would “base their testimony on their years of training and experience in the area of drug investigations.” In the context of testimony regarding the drug courier profile, notification that the witnesses would be testifying from years of experience as narcotics agents is sufficient. The summary provided the defendants with both the grounds and the background for the testimony, enabling them to prepare for cross-examination. Other contexts, such as cases involving technical or scientific evidence, may require greater disclosure, including written and oral reports, tests, investigations, and any other information that may be recognized as a legitimate basis for an opinion under Fed.R.Evid. 703. See Fed.R.Crim.P. 16(a)(1)(E) advisory committee note.
In this instance, we hold that the government’s notice met the requirements of Rule 16(a)(1)(E). What was provided was the minimum notice required under the Federal Rules of Criminal Procedure. The government supplying anything less in the future will risk running afoul of the rule. Although the rule was not violated here, in light of the somewhat amorphous parameters of the drug courier profile, in future cases we strongly encourage the government to offer more specific descriptions of the opinions of the witnesses, foundations for their testimony, and their qualifications.
Even had the government violated the rule, the appropriate remedy was not necessarily exclusion of the testimony. Fed. R.Crim.P. 16(d)(2) specifically provides several potential remedies the district court may take in response to discovery violations. 16(d)(2) states that the court “may,” but is
*652
not required to, impose sanctions including ordering disclosure, granting a continuance, prohibiting admission of the evidence, or any other response deemed necessary. This rule does not mandate the suppression of evidence for a discovery violation. These sanctions are left to the discretion of the court,
United States v. Beverly,
B.
Jackson and Rodriguez also both argue that the court violated their Sixth Amendment confrontatiоn rights when it prevented them from questioning a witness about a past act of perjury. During the cross-examination of O’Malley, the landlord of the raided apartment, counsel for both defendants attempted to question him regarding statements he had made on a petition for bankruptcy. The government objected to the inquiry and the defense made an order of proof at the bench, alleging that O’Malley’s bankruptcy petition failed to list all lawsuits in which he had been involved in the past ten years, thus amounting to perjury. The defendants argue that they needed to bring out those false statements in order to attack O’Malley’s credibility.
Although the Sixth Amendment confrontation clause
5
guarantees defendants the right to cross-examine witnesses,
see Ohio v. Roberts,
Ordinarily, we review the district court’s rulings regarding the scope of cross-examination for an abuse of discretion.
United States v. Nelson,
Limiting a party’s right to cross-examine for the purposes of impeachment is more a peripheral concern than a “core value.”
Nelson,
The Federal Rules of Evidence also provide that admissibility of evidence intended to impeach the credibility of а witness is largely a matter for the discretion of the trial court. Rule 608(b) states:
Specific instances of the conduct of a witness for the purpose of attacking the credibility, other than conviction of crime as provided in Rule 609, may not be proved by extrinsic evidence. They may, however, in the discretion of the court, if probative of truthfulness or untruthfulness, be inquired into on cross-examination of the witness concerning the witness’ character for truthfulness or untruthfulness ...
Fed.R.Evid. 608(b) (emphasis added);
see Nelson,
C.
Jackson and Rodriguez also maintain that the district court improperly instructed the jury that a conviction under 18 U.S.C. § 924(c)(1) could be based on constructive possession. Specifically, the defendants objected to the court’s instruction number 20, which stated:
For the government to sustain its burden of proof that a defendant carried a firearm, it need not show that a defendant actually carried the firearm on his person. It is sufficient if you find that at a given time he had the ability аnd intent to control the firearm and the circumstances of the case show that the firearm facilitated or had a role in the crime being committed. Having a gun accessible during a drug transaction is sufficient to meet the “use or carry” requirements of 18 U.S.C. § 924(c).
The district court also instructed that:
To sustain the charge of carrying or using a firearm during and in relation to a drug trafficking crime, the government must prove the following propositions: Third, the defendants carried or used the firearm during and in relation to the commission of a drug trafficking crime.
We review jury instructions as a whole, and so long as the instructions treat the issues fairly and adequately, we will not interfere with them on appeal.
United States v. Sax,
To convict under
§
924(c), the government must prove beyond a reasonable doubt that the defendant: (1) possessed a gun; and (2) used it in relation to a drug offense.
United States v. Chairez,
An examination of the instructions as a whole shows that the district court’s instructions accurately stated the law in describing both the possession and connection requirements. The court first told the jury that it must find that the defendant “had the ability and intent to control the firearm.” This portion of the instruction required the jury to find that the defendant, although not actually brandishing the weapon, possessed it through his ability and intent to control it. The court then informed the jury that it must find that the “firearm facilitated or had a role in the crime being committed.” This second part of the instruction conveyed to the jury that the gun “must facilitate or have the potential of facilitating the drug trafficking offense.”
Villagrana,
D.
Jackson contends that the district court improperly admitted evidence that the government used to show his connection with the apartment under Fed.R.Evid. 403. Specifically, Jackson objected to the admission of exhibits of receipts containing his last name (and in one instance, his address). During trial, the government introduced receipts found in the duffle bag in the second bedroom bearing the name
“Tajh
Jackson.” Jackson objected to the admission of these receipts, arguing that there was no evidence that he and “Tajh” Jackson were the same person and that, other than containing a common last name, the receipts were not related to him. He contends that the limited relevance of the receipts is outweighed by the danger that the jury would interpret them as belonging to him, even though there was no evidence that he was “Tajh” Jackson. We review the district court’s decision to admit the challenged evidence for an abuse of discretion.
United States v. Wilson,
Fed.R.Evid. 403 provides that relevant “evidence may be excluded if its probative value is substantially outweighed by the danger of unfair prejudice, confusion of the issues, or misleading the jury ...” Despite Jackson’s assertions to the contrary, more evidence than the similarity of names linked Jackson to the receipts. The receipts were found in the same apartment to which Jackson was holding keys and where he was arrested. Moreover, the mere existence of the potential for jury confusion is not enough to warrant exclusion under 403. Rather, this confusion must reach a level which would substantially outweigh its value, a possibility Jackson did not establish. Finally, as the district court pointed out at trial, defense counsel had the opportunity at final argument to clarify any possible confusion. The district court did not abuse its discretion in admitting these exhibits.
E.
Jackson’s final argument, buttressed by little legal support, challenges his possession conviction on sufficiency of the evidence grounds. He argues that because the police found no cocaine or firearms on his actual person, and, because Jackson did not exercise control over any of the guns or drugs found in the apartment, the evidence was insufficient to convict him. The entire thrust of Jackson’s argument is that when the police surprised Jackson at the apartment, he was not at that precise moment in time carrying drugs or weapons. He essentially asks us to hold that no matter how close a defendant is to over 100 grams of cocaine and four handguns, if he is not latched on to the contraband at that moment in time he cannot be convicted. We refuse to so hold.
*655
In order to prove possession with intent to distribute cocaine, the government must prove beyond a reasonable doubt that the defendant: (1) knowingly or intentionally possessed cocaine; (2) possessed cocaine with the intent to distribute it; and (3) knew the cocaine was a controlled substance.
United States v. Hernandez,
For the foregoing reasons, the district court’s decision is Affirmed.
Notes
. The new Fed.R.Crim.P. 16(a)(1)(E) took effect on December 1, 1993, prior to the trial.
. Specifically, the district court stated:
[fit's a pretty generic run-of-the-mill sort of testimony from the agent, and you [defendants] have full knowledge of the items that were seized, the full array of evidence that the Government was going to offer, at least there's been no suggestion to the contrary. It appears to me that the notice, plus the notice provided by the government in its summary statement should have sufficed....
The summary that the Government has provided is sufficient under that rule; and it is sufficient particularly in light of the other disclosures that have been made early on in terms of the evidence that was seized and was likely to be used in the course of this triаl.... They [the defendants] hang their hats on an unduly technical interpretation of Rule 16 to begin with, and it can't be considered without also taking into account all the other evidence and notifications that were given ...
[I]t is expert testimony in terms of what a lay jury would know, but in terms of the standard prosecution of drug cases, it is not unusual evidence or testimony, it's not complicated, it’s not complex. As this witness has testified in his own proffer, it's true in 99 percent of the cases that these items of evidence are found, seized, and used in the prosecution. So the lawyers cannot have been surprised by any of these developments, misled or prejudiced.
. Kenney testified that: (1) in 99% of drug cases, sellers of drugs carry digital beepers; (2) drug dealers often use two-way radios in connection with drug houses to avoid police detection and to assist in servicing customers; (3) drug traffickers commonly use scales to weigh quantities of narcotics; (4) drug traffickers commonly carry United States currency; (5) drug dealers commоnly use firearms to protect themselves against theft by buyers and other dealers; (6) the quantities of cocaine base seized from the apartment were demonstrative of possession for sale; and (7) crack houses are typified by the lack of furniture and the advance payment of rent.
. Given that the expert testimony summary that the government sent to Jackson was substantially identical to that sent to Rodriguez (differing only in that the name "Emmit C. Carney” was cited in place of “Paul Arkins”), we treat the responses as one.
. The Sixth Amendment provides: “In all criminal prosecutions, the accused shall enjoy the right ... to be confronted with the witnesses against him....” U.S. Const, amend. VI.
