The Federal Public Defender appointed to represent Gilberto Gonzales-Cornejo has moved for leave to withdraw and has filed a brief in accordance with Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967). Gonzales-Cornejo has filed a response and has moved for this court to appoint substitute counsel. The record is insufficiently developed to allow consideration at this time of Gonzales-Cor-nejo’s claims of ineffective assistance of counsel; such claims generally “cannot be resolved on direct appeal when [they have] not been raised before the district court since no opportunity existed to develop the record on the merits of the allegations.” United States v. Cantwell, 470 F.3d 1087, 1091 (5th Cir. 2006) (internal quotation marks and citation omitted). Our independent review of the record, counsel’s brief, and Gonzales-Cornejo’s response discloses no nonfrivolous issue for appeal. Accordingly, the motion for leave to withdraw is GRANTED, Gonzales-Cornejo’s motion for appointment of substitute counsel is DENIED, counsel is excused from further responsibilities herein, and the APPEAL IS DISMISSED. See 5th Cir. R. 42.2.