United States v. Dixon

POSNER, Circuit Judge.

We have consolidated for decision the appeals in two cases that raise overlapping issues, primarily under the ex post facto clause of Article I, section 9, of the Constitution.

Both defendants were convicted — Dixon after a bench trial on stipulated facts, Carr after conditionally pleading guilty — of violating the Sex Offender Registration and Notification Act (part of the Adam Walsh Child Protection and Safety Act of 2006), 18 U.S.C. § 2250. The Act, which went into effect on July 27, 2006, imposes criminal penalties on anyone who, being required by the Act to register,…