
    UNITED STATES of America, Plaintiff-Appellee, v. Antoine LESTRICK, Defendant-Appellant.
    No. 03-4011.
    United States Court of Appeals, Tenth Circuit.
    Nov. 28, 2003.
    
      Wayne T. Dance, Asst. U.S. Attorney, Office of the United States Attorney, District of Utah, Salt Lake City, UT, for Plaintiff-Appellee.
    Antoine Lestrick, Draper, UT, for Defendant-Appellant.
    Before SEYMOUR, MURPHY, and O’BRIEN, Circuit Judges.
   ORDER AND JUDGMENT

O’BRIEN, Circuit Judge.

After examining the briefs and appellate record, this panel has determined unanimously that oral argument would not materially assist the determination of this appeal. See Fed. R.App. P. 34(a)(2); 10th Cir. R. 34.1(G). The case is therefore ordered submitted without oral argument.

Antoine Lestrick appeals from his conviction and sentence, invoking our jurisdiction under 28 U.S.C. § 1291 and 18 U.S.C. § 3742(a). His counsel on appeal filed a brief pursuant to Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), and moved for leave to withdraw. For the reasons set forth below, we grant counsel’s motion to withdraw, dismiss the appeal in part and affirm the district court with respect to the issue that survived dismissal.

II. Background

On March 6, 2002, Lestrick was indicted on a single count of being a felon in possession of a firearm in violation of 18 U.S.C. § 922(g)(1). On May 22, 2002, present counsel was appointed for Les-trick. Counsel demanded discovery from the government, specifically requesting production of exculpatory material. Later, Lestrick negotiated a plea agreement in which he waived his right to appeal from his sentence unless, inter alia, the sentence was imposed in violation of the law. Pursuant to that agreement, Lestrick entered an unconditional plea of guilty to the charged offense on October 7, 2002.

Lestrick was provided a copy of the presentence report recommending the base offense level of twenty-four be increased two levels pursuant to United States Sentencing Guidelines (USSG) § 2K2.1(b)(4) because the firearm he illegally possessed was stolen. The government also provided Lestrick with copies of police reports verifying that the illegally possessed firearm was also stolen. Appellate Br. at 10-11. On December 2, 2002, he filed a written objection to the recommendation. The district court imposed the recommended enhancement. On January 6, 2002, Lestrick was sentenced to eighty-four months imprisonment. This appeal followed.

In Appellant’s brief, counsel candidly admits to an absence of legal support for the arguments advanced. Nonetheless, as Adders requires, several possible issues are identified. Lestriek claims (1) his guilty plea was not knowing and voluntary because the government withheld certain exculpatory evidence, (2) the district court erred in denying his suppression motion, and (3) he suffered from ineffective assistance of counsel.

II. Discussion

Lestriek asked to be provided with all exculpatory material, but the government did not disclose police reports verifying that the firearm was stolen until after he pled guilty. That untimely disclosure, he argues, is a violation of Brady v. Maryland, 373 U.S. 83, 83 S.Ct. 1194, 10 L.Ed.2d 215 (1963), and, accordingly, his guilty plea was not knowingly and intelligently made. Lestriek did not present this argument to the district court and did not attempt to withdraw his guilty plea.

We do not entertain appeals when a defendant has waived the right to appeal. United States v. Rubio, 231 F.3d 709, 711 (10th Cir.2000). But, Lestriek reserved the right to appeal from a sentence imposed in violation of law and we have recognized that “under certain limited circumstances, the prosecution’s violation of Brady can render a defendant’s plea involuntary.” United States v. Wright, 43 F.3d 491, 496 (10th Cir.1994). Accordingly, we consider the Brady argument. Because Lestriek failed to bring the alleged Brady violation before the district court, we review for plain error. United States v. Blandin, 784 F.2d 1048, 1051 (10th Cir. 1986).

To establish a Brady violation, a defendant must demonstrate “(1) the prosecutor suppressed evidence; (2) the evidence was favorable to the defendant as exculpatory or impeachment evidence; and (3) the evidence was material.” Knighton v. Mullin, 293 F.3d 1165, 1172 (10th Cir.2002), cert denied, — U.S.-, 123 S.Ct. 1588, 155 L.Ed.2d 325 (2003) (quoting Gonzales v. McKune, 247 F.3d 1066, 1075 (10th Cir. 2001)) (emphasis added). He doesn’t explain and we are unable to divine how the fact that the firearm was stolen (in addition to being illegally possessed) is, in any way, exculpatory. There was no Brady violation. That ends the inquiry since Lestriek offers no other reason why his plea was other than knowing and intelligent.

Lestriek also argues the district court erred in denying a motion to suppress. But a voluntary, knowing, and unconditional plea of guilty waives all non-jurisdictional defenses and thus precludes appellate review of the denial of that motion. United States v. Davis, 900 F.2d 1524, 1525-26 (10th Cir.1990). Other than the Brady argument, discussed supra, Lestriek does not claim his unconditional plea was not knowingly and voluntarily entered.

Finally, Lestriek claims (restated for clarity): 1) his counsel failed to diligently pursue discovery and therefore did not know the firearm was stolen before he entered his guilty plea, 2) had counsel known the firearm was stolen and appreciated the attendant risk of a sentencing enhancement, the potential consequences could have been evaluated before the guilty plea was entered, and 3) he was thereby denied effective assistance of counsel. Evaluation of this argument will require record development in the district court. “[I]neffeetive assistance of counsel claims should be brought in collateral proceedings, not on direct appeal. Such claims brought on direct appeal are presumptively dismissible, and virtually all will be dismissed.” United States v. Galloway, 56 F.3d 1239, 1240 (10th Cir.1995). We therefore decline to review the ineffective assistance of counsel claim.

Accordingly, the judgment and sentence of the district court are AFFIRMED with respect to his allegation the sentence was illegally imposed because of a Brady violation. The appeal is DISMISSED with respect to the remaining issues. Counsel’s request to withdraw is GRANTED. 
      
       This order and judgment is not binding precedent except under the doctrines of law of the case, res judicata and collateral estoppel. The court generally disfavors the citation of orders and judgments; nevertheless, an order and judgment may be cited under the terms and conditions of 10th Cir. R. 36.3.
     
      
      . If counsel determines an appeal would "be wholly frivolous, after a conscientious examination of it, he should so advise the court and request permission to withdraw." Anders, 386 U.S. at 744. Counsel must also submit to the court a brief addressing anything in the record that arguably supports the appeal, and the defendant must be given the opportunity to raise any additional points. Id.
      
     
      
      . Lestriek also claims the district court erred in refusing to grant a requested downward departure, but makes no argument in support of that claim. Instead he argues that the trigger fact for sentencing enhancement, the stolen firearm, should have been alleged in the indictment and proven at trial, citing Apprendi v. New Jersey, 530 U.S. 466, 476, 120 S.Ct. 2348, 147 L.Ed.2d 435 (2000). He suggests our cases to the contrary should be overruled, but does not offer cogent argument. We disregard such claims. United States v. Metzger, 233 F.3d 1226, 1229 (10th Cir.2000) (citing Phillips v. Calhoun, 956 F.2d 949, 953 (10th Cir. 1992))
     