The Federal Public Defender appointed to represent Charles Anthony Roberts has requested 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). Roberts has filed a response. Our independent review of the record, counsel’s brief, and Roberts’s response discloses no nonfrivolous issue for appeal. The record is insufficiently developed to allow consideration at this time of Roberts’s claims of ineffective assistance of counsel. See United States v. Cantwell, 470 F.3d 1087, 1091 (5th Cir. 2006). Accordingly, counsel’s motion for leave to withdraw is GRANTED, counsel is excused from further responsibilities herein, and the APPEAL IS DISMISSED. See 5th Cir. R. 42.2. The motion by Roberts for substitution of counsel is DENIED. See United States v. Wagner, 158 F.3d 901, 902-03 (5th Cir. 1998).