In Missouri, failing to register as a sex offender is a class C felony, pursuant to RSMo. Sections 589.400 and 589.425. The Missouri Court of Appeals for the Southern District recently had an opportunity to rule on some important aspects of this offense, and reached an interesting conclusion. The case was State of Missouri v. William Wilder, No. SD33140, on appeal from Wright County, Missouri. The decision was reached on January 16, 2015.