United States of America v. Volungus, US Court of Appeals for the First Circuit, January 8, 2010 [upholding the constitutionality of provisions of the Adam Walsh Child Protection and Safety Act, which allow a person deemed "sexually dangerous" to be civilly committed after the expiration of a federal criminal sentence].
Reported in JURIST's Paper Chase here. Latest commentary available here. JURIST has more on the Adam Walsh Act.