Franklin H. Rorebeck pleaded guilty to conspiring to distribute and possess with intent to distribute methamphetamine, in *694violation of 21 U.S.C. §§ 841 and 846. The district court1 sentenced him to 210 months in prison and 5 years of supervised release. On appeal, in a brief filed pursuant to Anders v. California, 386 U.S. 738, 87 S.Ct. 1396, 18 L.Ed.2d 493 (1967), counsel challenges the district court’s denial of a downward departure from the advisory Guidelines range based on Rorebeck’s overstated criminal history. The district court’s decision is unreviewable because the court acknowledged its authority to depart, and nothing in the record indicates the court’s refusal was based upon an unconstitutional motive. See United States v. Morell, 429 F.3d 1161, 1164 (8th Cir. 2005) (following United States v. Booker, 543 U.S. 220, 125 S.Ct. 738, 160 L.Ed.2d 621 (2005), district court’s discretionary decision not to depart downward is still not reviewable under 18 U.S.C. § 3742); United States v. Dabney, 367 F.3d 1040, 1044 (8th Cir.2004) (district court’s refusal to grant downward departure is generally unreviewable on appeal, unless district court had unconstitutional motive or erroneously believed it was without authority to grant departure).
Having independently reviewed the entire record in accordance with Penson v. Ohio, 488 U.S. 75, 109 S.Ct. 346, 102 L.Ed.2d 300 (1988), and finding no nonfrivolous issues, we affirm the judgment of the district court. Counsel’s motion to withdraw is granted.