Landen Max Dula and Accrabond Corporation were convicted by a jury of wire fraud, mail fraud, and false statements. Defendants now appeal their convictions, alleging a Brady violation, a comment on the failure of Dula to testify, and a violation of Fed.R.Evid. 404(b). Defendants also allege that the evidence was insufficient to prove Dula’s intent to defraud, and that the trial court erred in denying a motion for new trial because the verdict was against the weight of the evidence. As the Brady claim is not presented in the record, it is dismissed without prejudice to the defendants’ right to raise it in an action under 28 U.S.C. § 2255. As to all other issues, we find no error, and affirm.
I. FACTS AND PROCEDURAL HISTORY
Landen Max Dula is the founder and president of Accrabond Corporation, which is engaged in the sale of industrial sealants, adhesives, coatings, and other chemical products for military, government, and commercial aerospace use. Accrabond manufactured its own line of products, and distributed products of other manufacturers.
On May 16, 1991, Dula and Accrabond were indicted in the Northern District of Mississippi on charges of wire fraud, mail fraud, and false statements. The 32 count indictment charged that between January 1988 and September 1989, the defendants devised a scheme to defraud and obtain money under false pretenses by representing that products sold and supplied conformed to the purchaser’s specifications when they did not. Defendants were also charged with fraudulently substituting falsely identified and nonconforming products, 2 relabeling stale, outdated, and expired products as fresh, recently acquired products with extended shelf life, 3 coloring, thinning, and altering the appearance of products to conform to the appearance of other products and substituting them for other products, 4 and using false labels, shipping documents, and certificates of compliance to conceal the fraudulent sub *775 stitution of products. 5
The indictment alleged eighteen instances of the use of interstate wire communications in violation of 18 U.S.C. §§ 2, 1343, and one of the mail in violation of 18 U.S.C. §§ 2, 1341 in execution of a scheme to defraud thirteen aerospace and defense supply companies. 6 The indictment further charged the defendants with thirteen counts of falsely certifying products ■ for use in defense contracts in violation of 18 U.S.C. §§ 2, 1001.
After a ten day jury trial in December, 1991, Accrabond was convicted on all but one count of wire fraud, and Dula was. convicted on six counts of wire fraud and five counts of false statements. On February 18, 1992, Accrabond was sentenced to pay a fine of $248,000, and restitution in the amount of $8,238.32. Dula was sentenced to a term of imprisonment of thirty-six months on each count, to be served concurrently, as well as a fine of $27,500. The defendants filed a notice of appeal February 24, 1992, from the judgments entered by U.S. District Judge Neal B. Big-gers, Jr., and the court stayed execution of the judgment pending appeal.
II. ANALYSIS
A. BRADY VIOLATION
Defendants contend that the government violated the disclosure requirements of
Brady v. Maryland,
The government argues that it has not violated the requirements of Brady since the information was equally available to the Defendants, 9 and the information is not *776 material. 10 We decline to address these arguments at this time because, as indicated by oral argument, there is no evidence in the record concerning the test results that the government is alleged to have withheld in violation of Brady. In the absence of a record, we cannot fairly evaluate the merits of the defendants’ claim. We therefore dismiss the defendants' Brady claim without prejudice to their right to raise the issue in a proceeding under 28 U.S.C. § 2255. 11 See 3 Wright, Federal Practice and Procedure: Criminal 2d § 594 p. 453.
B. COMMENT ON DULA’S FAILURE TO TESTIFY
Dula also contends that the trial court erred when it denied a motion for mistrial following a statement by the prosecutor in closing argument that it claims called the jury’s attention to the fact that the Dula had elected not to testify. Dula argues that the failure of the trial court to declare a mistrial, or at least give a curative instruction, denied him his Fifth Amendment rights.
The Fifth Amendment prohibits a prosecutor from commenting directly or indirectly on a defendant’s failure to testify.
Griffin v. California,
However, the comments complained of must be viewed within the context of the trial in which they aré made.
United States v. Bright,
Well, let me talk about PRC just a minute. There’s been nobody on this witness stand that really knows about what happened between PRC and Accra-bond Corporation.
(Tr. 1784). The government argues that the context makes clear that the intent of the argument was not to comment on Dula’s failure to testify, but to make the point that none of the witnesses who had testified about the existence of a lawsuit by *777 PRC against Accrabond actually knew anything about it.
It is not error to comment on the defendant’s failure to produce evidence on a phase of the defense upon which he seeks to rely.
See, e.g., United States v. Bright,
In any case, the district court’s instructions to the jury emphasized that the defendant need not testify, and that no inference.could be drawn from his failure to testify. (Tr. 1082). Therefore, even if there was harm created by counsel’s comments, it was offset by the court’s instructions.
See, e.g., United States v. Smith,
C. VIOLATION OF FED.R.EVID. 404(b)
Defendants next contend that the trial court violated Fed.R.Evid. 404(b) 12 by permitting the introduction of testimony concerning an alleged prior bad act of Dula and Accrabond which was not charged in the indictment. During the trial, the government elicited testimony regarding a sale of materials by Accrabond to Pan Metals, a Korean corporation. Rick Drexler, a former laboratory manager at Accrabond, told the jury that Pan Metals had ordered a Dow Corning adhesive, but had been sent a substitute product, which “did not get by” Pan Metals. (Tr. 969-971). This transaction was not among those alleged in the indictment.
This court has set forth a two-part test for determining the propriety of admitting evidence of “bad acts” not alleged in the indictment.
United States v. Beechum,
Evidence of an uncharged offense arising out of the same transaction or series of transactions as the charged offense is not an “extrinsic” offense within the meaning of Rule 404(b), and is therefore not barred by the rule.
See, e.g., United States v. Simpson,
In this case, the existence of a scheme to defraud is an element of the
*778
offense of wire fraud under 18 U:S.C. § 1343. Although Pan Metals’ order was not one of those charged in the indictment, it was relevant to the existence of a scheme and therefore was independently admissible as direct proof of the scheme charged.
United States v. Santagata,
D. SUFFICIENCY OF THE EVIDENCE OF DULA’S INTENT TO DEFRAUD
Dula also argues that a review of the trial demonstrates that the government failed to establish its wire fraud allegations because it introduced no evidence that the use of the wires was preceded by an intent to defraud.
To obtain Dula’s convictions for the crimes of wire fraud alleged in the indictment, the government was required to prove beyond , a reasonable doubt that he aided and abetted the use of the wires in furtherance of a scheme to defraud.
United States v. Shively,
The above proof is sufficient, even standing alone, because the sequence and timing of the phone calls is immaterial. Once membership in a scheme to defraud is established, a knowing participant is liable for any wire communication which subsequently takes place or which previously took place in connection with the scheme.
See United States v. Westbo,
E. VERDICT AGAINST THE WEIGHT OF THE EVIDENCE ' '
Finally, appellants contend that the trial court abused its discretion by denying a motion for new trial which asserted that the weight of the evidence supported the defendants’ acquittal.
The decision to grant or deny a motion for new trial based on the weight of the evidence is within the sound discretion of the trial court. An appellate court may reverse only if it finds the decision to be a “clear abuse of discretion.”
United States v. Martinez,
*779 Defendants argue that the Government’s witnesses were not credible witnesses because they were disgruntled former employees of the defendants. However, as stated above, that credibility determination is best left for the jury. The district court did not abuse its discretion in accepting the jury’s assessment of the credibility of the witnesses and denying a motion for new trial on the ground that the verdict was against the weight of the evidence.
III. CONCLUSION
For the foregoing reasons, we AFFIRM the judgments of the district court, but DISMISS the defendants’ Brady claims, without prejudice to their right to raise them in an action under 28 U.S.C. § 2255.
Notes
. Many aerospace products carry manufacturer’s lot numbers to provide a mechanism for a manufacturer to trace and recall defective lots. Accrabond provided its own lot numbers, or purchased small quantities of a product in order to obtain an authentic lot number.
. Most aerospace products such as those sold by Accrabond carry a shelf life, beyond which they must be retested to determine whether they still meet the standards of performance prescribed by military specifications.
.Any alteration of a product after manufacture, such as thinning, dying, etc. may also change performance, and therefore also requires retesting to determine if the product still meets the military specifications.
. Most of Accrabond’s business was conducted by telephone or fax transmissions, which were then entered into a computer, which generated a sales order and a manufacturing order. The order form also had a space for entering "blind notes," which were used to instruct Accrabond employees on what substitute to send for the product ordered, or what substitute had been supplied to the customer on a previous order. The documents sent to the customer, however, all described the product ordered, and did not reveal that a substitute had been supplied.
. The defendants were charged with illegally using wire communications when accepting telephone purchase orders from various customers. Further, the defendants allegedly submitted false statements or entries by supplying fraudulent certificates of compliance indicating that a particular product conformed to a particular military specification.
. In
Brady v. Maryland,
. In closing argument, counsel for the Defendants argued that while the government had alleged that faulty products sold by Accrabond had endangered the performance of weapons such as the cruise missile, the demonstration of the effectiveness of our country’s military technology in the Persian Gulf War, including missiles made with materials sold by Accrabond, showed that the products were not deficient. (Tr. 1755). In response, the prosecutor stated in rebuttal that only an inspection of the materials could have revealed what problems there might have been with Accrabond, products, and asserted that such an inspection would have been impossible. (Tr. 1775-1776).
.
Brady
does not oblige the Government to provide defendants with evidence that they could obtain from other sources by exercising reasonable diligence. When evidence is available equally to the defense and the prosecution, the defendants must bear the responsibility for their
*776
failure to diligently seek its discovery.”
See, e.g., United States v. McKenzie,
. A defendant must establish that withheld evidence favorable to the accused is “material" in order to succeed on a
Brady
claim.
See United States v. Ellender,
In this case, the government argues that whether or not some of Accrabond’s products were not fraudulent or nonconforming was.not at issue, and is in fact irrelevant. Rather, the issue was whether the products were falsely represented and certified.
See, e.g., United States v. Grimm,
. This is similar to our procedure for ineffective assistance of counsel claims. Where such claims are not raised before the trial court, they cannot be resolved on direct appeal since the district court has had no opportunity to develop the record as to the merits of the allegations.
See, e.g., United States v. Higdon,
. Federal Rule of Evidence 404(b) provides: Evidence of other crimes, wrongs, or acts is not admissible to prove the character of a person in order to show action in conformity therewith. It may, however, be admissible for other purposes, such as proof of motive, opportunity, intent preparation, plan, knowledge, identity, or absence of mistake or accident, provided that upon request by the accused, the prosecution in a criminal case shall provide reasonable notice in advance of trial, or during trial if the court excuses pretrial notice on good cause shown, of the general nature of any such evidence it intends to introduce at trial.
. Federal Rule of Evidence 403 states:
Although 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, or by considerations of undue delay, waste of time, or needless presentation of cumulative evidence.
