knowing" violation of § 2250(a) required proof that Voice knew his actions triggered an obligation to update his registration. agg United States v. Griffey, 589 F.3d 1363, 1367 (1 1 th Cir. 2009), cert. denied, 130 S. Ct. 3290 (2010). A defendant is not entitled to a theory-of-defense instruction that