Missouri Revised Statutes Title XXXVIII. Crimes and Punishment; Peace Officers and Public Defenders § 568.010. Bigamy--penalty

1. A married person commits the offense of bigamy if he or she:

2. A married person does not commit bigamy if, at the time of the subsequent marriage ceremony, he or she reasonably believes that he or she is legally eligible to remarry.

3. The defendant shall have the burden of injecting the issue of reasonable belief of eligibility to remarry.

4. An unmarried person commits the offense of bigamy if he or she:

5. The offense of bigamy is a class A misdemeanor.