The Federal Public Defender appointed to represent Juan Rodriguez-Aguirre 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), and United States v. Flores, 632 F.3d 229 (5th Cir. 2011). Rodriguez-Aguirre has filed a response.

We have reviewed counsel’s brief and the relevant portions of the record reflected therein, as well as Rodriguez-Aguirre’s response. We concur with counsel’s assessment that the appeal presents no nonfrivolous issue for appellate review before our panel. In his response, Rodriguez-Aguirre challenges, inter alia, the enhancement applied pursuant to U.S.S.G. § 2Ll.l(b)(7)(D) (2015) due to the death of an undocumented alien. He argues that while this circuit applies a but-for causation requirement to determine whether an offense caused a death, other circuits apply a proximate cause standard, which he contends is the proper standard. This contention is foreclosed, see United States v. Ramos-Delgado, 763 F.3d 398, 401-02 (5th Cir. 2014), but by raising the issue, Rodriguez-Aguirre has preserved it for further review.

The motion for leave to withdraw is GRANTED, counsel is excused from fur *297 ther responsibilities herein, and the APPEAL IS DISMISSED. See 5th Cir. R. 42.2.