Here is the unpublished opinion in United States v. George.

An excerpt:

Defendant-Appellant Phillip William George (“George”) was convicted of the federal crime of sexual abuse of a minor on an Indian reservation in violation of 18 U.S.C. §§ 2243(a)and 1153. He served his sentence for that offense, but then he failed to register as a sex offender in violation of the Sex Offender Registration and Notification Act (“SORNA”), 18 U.S.C. § 2250. He was convicted of that offense in 2008, pursuant to a conditional guilty plea, and now appeals that conviction. He contends his conviction is invalid because the state where he was required to register, Washington, had not implemented SORNA. He also argues SORNA’s registration requirement is an invalid exercise of congressional power and violates the Ex Post Facto Clause of the Constitution.