Herman George appeals his guilty-plea conviction and sentence for possession of firearms by an armed career criminal. See 18 U.S.C. §§ 922(g)(1), 924(e). George argues that the district court abused its discretion in denying the Assistant Federal Public Defender Chris A. Cooklin’s first motion to withdraw as appointed counsel. A valid guilty plea waives any nonjurisdic-tional defects leading to a conviction United States v. Owens, 996 F.2d 59, 60 (5th Cir. 1993). The issue of the district court’s denial of appointed counsel’s motion to withdraw involves a purported nonjurisdie-tional defect waived by George’s valid guilty plea. See id.

George also argues that the district court erred in denying his motion to withdraw his guilty plea. A district court may grant a motion to withdraw a guilty plea before a defendant is sentenced upon a showing by the defendant of “a fair and just reason for requesting the withdrawal.” Fed. R.Crim. P. 11(d)(2)(B) (2003); United States v. Brewster, 137 F.3d 853, 857 (5th Cir. 1998) (citing former Fed. R.Crim. P. 32(e)); see also United States v. Carr, 740 F.2d 339, 343-44 (5th Cir. 1984). The district court did not abuse its discretion in denying George’s motion to withdraw his guilty plea. See Brewster, 137 F.3d at 857-58.

AFFIRMED.