Diigo Post Excerpt:
This appeal challenges the constitutionality of certain key provisions of the Sex Offender Registration and Notification Act (SORNA). Pub. L. 109-248, §§ 101-55, 120 Stat. 587, 590-611 (codified in scattered sections of U.S.C. (2006)). Defendant Mark Steven Elk Shoulder was prosecuted under 18 U.S.C. § 2250(a) for failing to comply with the sex offender registration requirements set forth in 42 U.S.C. § 16913. He now argues that his conviction was invalid, because SORNA violates the Ex Post Facto Clause and the Due Process Clause, and because Congress lacked the constitutional authority to enact SORNA. We reject these constitutional challenges and affirm the judgment of the district court.