Reynolds v. United States

The federal Sex Offender Registration and Notification Act (Act), 120 Stat. 590, 42 U. S. C. § 16901 et seq. (2006 ed. and Supp. Ill), requires those convicted of certain sex crimes to provide state governments with (and to update) information, such as names and current addresses, for inclusion on state and federal sex offender registries. §§ 16912(a), 16913-16914, 16919(a) (2006 ed.). The Act makes it a crime for a person who is “required to register” under the Act and who “travels in interstate or foreign commerce” knowingly to “fai[l] to register or update a registration . . . .” 18 U. S.…