OPINION OF THE COURT
Manfred DeRewal appeals from a district court order denying his motion to vacate his sentence under 28 U.S.C. § 2255. Adopting the report and recommendation of a magistrate judge, the district court held, among other things, that DeRewal had not shown “cause” pursuant to
United States v. Frady,
*102 I.
DeRewal was indicted in 1988 for one count of conspiracy to import phenyl-2-pro-panone (P2P) into the United States from Costa Rica, in violation of 21 U.S.C. § 963; one count of importation of P2P, in violation of 21 U.S.C. § 952(a); and one count of attempting to import P2P, in violation of 21 U.S.C. § 963. Before trial, DeRewal moved to suppress the fruits of wiretaps conducted in Costa Rica, contending that the wiretaps violated the Fourth Amendment and Costa Rican law. After a hearing, the district court denied this motion.
United States v. DeRewal,
DeRewal was subsequently tried before a jury and convicted on all counts. He appealed, but we affirmed his conviction and issued an unpublishеd Memorandum Opinion. In response to his argument that his suppression motion had been improperly denied, we held that the district court had applied the correct legal standard and had not made any clearly erroneous findings of fact. We also rejected DeRewal’s argument that the district court had erred in allowing the testimony of a prosecution witness, Peggy Turner Dunn, whose identity had not bеen disclosed to him prior to trial. We stated that we were “impressed ... that the government gave defense counsel rough notes of a prior interview by the FBI with [Peggy Turner Dunn], thus providing counsel with possible materials for impeachment” and that “defense counsel was given unrestrictive opportunity to cross-examine her out of the presence of the jury before her testimony.” United States v. DeRewal, No. 89-1298, at 5-6 (3d Cir. Sept. 8, 1989). 1
After our decision on direct appeal, DeRe-wal filed in the district court a motion for a new trial based on newly discovered evidence. In this motion, DeRewal first contended that he had discovered new evidence that supported his argument that the Costa Rican wiretap violated Costa Rican law and was part of a joint venture involving United States agents. DeRewal also contended that hе had uncovered new evidence showing that Peggy Turner Dunn had testified falsely. The district court denied this motion. The court held that DeRewal had not shown that the evidence concerning the Costa Rican wiretap was newly discovered or that it could not have been discovered with due diligence by trial counsel. The court also observed that the evidence did not concern DeRewal’s guilt or innocence but only the issue of suppression. Finally, the court held that “even without the wiretap evidence it was improbable that [DeRewal] would be acquitted.” With respect to the evidence concerning Peggy Turner Dunn, the court observed that the propriety of allowing her testimony had been litigated at trial and that the only pieces of evidence bearing on this question that cоuld be considered newly discovered were “merely cumulative” and “impeaching.” The court also stated that “it is highly unlikely that such evidence would produce an acquittal.” DeRewal appealed the denial of his new tidal motion, but the appeal was dismissed by agreement of the parties.
DeRewal subsequently filed a motion to vacate his sentence under 28 U.S.C. § 2255. In support of this motion, hе first claimed that he had been denied the effective assistance of counsel at trial, primarily because his attorney had failed to conduct an adequate pretrial investigation. Second, he con *103 tended that the conduct of the United States agents related to the Costa Rican wiretap and the testimony of Peggy Turner Dunn and another witness was so egregious that it violated due process and required dismissal of the charges against him. As part of this argument, DeRewal again argued that the Costa Rican wiretap was illegal and was the product of a joint venture.
DeRewal’s motion was referred to a magistrate judge, who recommended that the motion be denied. The magistrate judge concluded that DeRewal was required to satisfy the “cause and prejudice” stаndard set out in Frady and that DeRewal had not shown “cause” for failing to raise his ineffective assistance of counsel claim on direct appeal or in his motion for a new trial. The magistrate judge also concluded that DeRewal’s arguments concerning the wiretap and the other alleged government misconduct were not cognizable under Section 2255 because they were based, not on trial error, but on evidence that was discovered after trial. Thus, the magistrate judge stated, the proper vehicle for asserting this argument was a motion for a new trial based on newly discovered evidence, and the magistrate judge stated that the district court’s denial of DeRe-wal’s new trial motion was dispositive of those claims. The district court adopted the magistrate judge’s report and recommendation and denied DeRewal’s motion. This appeal followed.
II.
DeRewal argues that the district court erred in holding that Frady’s “cause and prejudice” standard applies to his argument that his trial attorney provided ineffective assistance. We agree.
In
Frady,
a defendant sought to have his murder sentence vacated based on an erroneous jury instruction that he had not challenged at trial or on direct appeal. After reaffirming the principle that “a collateral challenge may not do service for an appeal,” the Court held that the proper standard for review of the defendant’s motion was the “ ‘cause and actual prejudice standard’ enunciated in
Davis v. United States,
Although the government’s brief in this case argued that DeRewal was required to show “cause and prejudice” with respect to his failure to raise his ineffective assistance of counsel claim on direct appeal, the government informed us shortly before argumеnt that it was withdrawing this contention based on the position taken by the Solicitor General in the Supreme Court in the case of
Billy-Eko v. United States,
No. 92-7897
(se
e — U.S. -,
It has long been the position of the United States that claims of ineffective assistance of trial counsel ordinarily should be raised in the first instance in a motion under Section 2255 rathеr than on direct appeal .... There are two reasons for that position: (1) if the same lawyer represented the defendant both at trial and on appeal, it is unrealistic to expect a lawyer to argue on appeal that his own performance at trial was ineffective; and (2) resolution of claims of ineffective assistance of trial counsel often requires consideration of matters that are outside the record on direct appeal and that should be considered by the district court in the first instance.
Respondent’s Brief at 6. Citing, among other cases, our decision in
United States v. Rieger,
*104 We agree with this analysis and accordingly hold that DeRewal was not required to show “cause and prejudice” with respect to his failure to raise his ineffective assistance of counsel claim on direct appeal. 2
While abandoning its argument concerning DeRewal’s failure to assert his ineffective assistance of counsel claims on direct appeal, the governmеnt adheres to its position that DeRewal was required to show “cause and prejudice” with respect to his failure to raise that claim as part of his Fed.R.Crim.P. 33 motion for a new trial based on newly discovered evidence. We reject this argument because a newly discovered evidence motion is at best a poorly suited vehicle for advancing an ineffective assistance of counsel claim.
In order to obtain relief under the Sixth Amendment based on trial counsel’s ineffective assistance, a defendant must show that counsel’s performance fell “outside the wide range of professionally competent assistance” and that his performance caused the defendant prejudice, i.e., deprived the defendant of “a trial whose result is reliable.”
Strickland v. Washington,
Attempting to shoehorn suсh a claim into a Rule 33 newly discovered evidence motion is not an easy task. For one thing, it seems clear that the type of evidence mentioned above (i.e., evidence that a reasonably competent attorney allegedly
would have discovered
by means of pretrial investigation) cannot constitute the newly discovered evidence on which a Rule 33 motion may be based. This is so because newly discovered evidence must be evidence that trial counsel
could not have discovered
with due diligence before trial.
See United States v. Iannelli,
Attempts have been made to assert ineffective assistance claims.in newly discovered evidence motions, on the theory that evidence of counsel’s ineffective performance at trial was newly discovered.
See, e.g., United States v. Ugalde,
In any event, assuming for the sake of argument that there are some circumstances *105 in which evidence of trial counsel’s deficient рerformance can qualify as newly discovered evidence, we still think that a newly discovered evidence motion is not the preferred vehicle for asserting such claims. As the Fifth Circuit aptly stated in Ugalde:
[Defendants prejudiced by ineffective assistance of counsel have a ready remedy. They may mount a collateral challenge by a federal habeas petition as allowed by 28 U.S.C. § 2255. That meсhanism, rather than a new trial, seems best to accommodate the interests in finality and fairness with respect to ineffective assistance of counsel claims.
We therefore hold that DeRewal was not required to show “cause and prejudice” in relation to his failure to raise his ineffective assistance of counsel claims in his newly discovered evidence motion. Accordingly, wе reverse the order of the district court insofar as these claims are concerned.
III.
DeRewal also argues that the district court erred in denying his claim that the government engaged in outrageous conduct that violated due process. We reject this argument.
DeRewal cites only one case involving the dismissal of an indictment based on outrageous government conduct,
United States v. Twigg,
The present case bears no resemblance to Tivigg. The “outrageous government conduct” alleged by DeRewal does not concern the fomenting of criminal activity by government agents. Rather, DeRewal argues that government officials engaged in outrageous conduct because, he maintains, they illegally caused his phone to be tapped in Costa Rica and improperly called Peggy Turner Dunn as a “last minute witness” and permitted her to give “mistaken” testimony. Appellant’s Brief at 29-30. These allegations do not bring the present ease within Twigg, and therefore DeRewal’s argument based on Twigg was properly rejected. 4
IV.
In summary, we reverse the decision of the district court insofar as it denied DeRewal’s *106 ineffective assistance of counsel claim, but we affirm the decision of the district court insofar as it denied DeRewaPs other claims. We remand this case to the district court for further proceedings consistent with this opinion.
SUR PETITION FOR REHEARING
Dec. 8, 1993
The petition for rehearing filed by appellant in the above entitled case having been submitted to the judges who participated in the decision of this court and to all the other available circuit judges of the circuit in regular active service, and no judge who concurred in the decision having asked for rehearing, and a majority of the circuit judges of the circuit in regular active service not having voted for rehearing by the court in banc, the petition for rehearing is denied.
Notes
. Our holdings in DeRewal's direct appeal are recounted here solely for purposes of background. Wc traditionally do not regard our unpublished decisions as having precedential value.
. A panel of the Seventh Circuit has recently endorsed a rule that makes
Frady
aрplicable to some but not all ineffective assistance of counsel claims asserted under 28 U.S.C. § 2255. Under this rule, "if a defendant postpones raising the issue of ineffective assistance of counsel until the collateral stage he must have a valid reason for a postponement,” such as the fact that trial counsel was also appellate counsel or that it reasonаbly appeared at the time of direct appeal that the development of facts not in the record was necessary to support the claim.
Guinan v. United States,
. In the 15 years since
Twigg
was decided, our court has not found any other case warranting dismissal of criminal charges on a similar ground.
See United States v. Martino,
. Rather than a true
Twigg
claim, DeRewal’s argument seems in large part to be an attempt to relitigate the trial judge’s refusal to suppress the fruits of the Costa Rican wiretap and his decision to permit Peggy Turner Dunn to testify. These questions, however, were raised and rejected on direct appeal. Many cases have held that Section 2255 generally "may not be employed to relitigate questions which were raised and considered on direct appeal.”
Barton v. United States,
