Judgment: Reversed, 7-2, in an opinion by Justice Breyer on June 24, 2013. Chief Justice Roberts and Justice Alito filed opinions concurring in the judgment. Justice Scalia filed a dissenting opinion. Justice Thomas filed a dissenting opinion, in which Justice Scalia joined as to parts I, II, and III-B.
Issue: (1) Whether the court of appeals erred in conducting its constitutional analysis on the premise that respondent was not under a federal registration obligation until the Sex Offender Registration and Notification Act (SORNA) was enacted, when pre-SORNA federal law obligated him to register as a sex offender; and (2) whether the court of appeals erred in holding that Congress lacks the Article I authority to provide for criminal penalties under 18 U.S.C. § 2250(a)(2)(A), as applied to a person who was convicted of a sex offense under federal law and completed his criminal sentence before SORNA was enacted.
Summary / Timeline: http://www.scotusblog.com/case-files/cases/united-states-v-kebodeaux/
Oral Argument: http://www.oyez.org/cases/2010-2019/2012/2012_12_418
SCOTUS Opinion: http://www.supremecourt.gov/opinions/12pdf/12-418_7k8b.pdf