The attorney appointed to represent Adolfo Michael Sosa has moved for leave to withdraw and has filed briefs in accordance with Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), and United States v. Flores, 632 F.3d 229 (5th Cir. 2011). Sosa has filed a letter in response. The record is not sufficiently developed to allow us to make a fair evaluation of Sosa’s claim of ineffective assistance of counsel; we therefore decline to *494 consider the claim without prejudice to collateral review. See United States v. Isgar, 739 F.3d 829, 841 (5th Cir. 2014).

We have reviewed counsel’s briefs and the relevant portions of the record reflected therein, as well as Sosa’s response. We concur with counsel’s assessment that Sosa’s appeal presents no nonfrivolous issue for appellate review. Accordingly, the 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.