South Dakota Codified Laws
Chapter 05 - Defenses
Section 22-5-10 - Insanity as affirmative defense--Burden of proof.

22-5-10. Insanity as affirmative defense--Burden of proof.
Insanity is an affirmative defense to a prosecution for any criminal offense. Mental disease or defect does not otherwise constitute a defense. The defendant has the burden of proving the defense of insanity by clear and convincing evidence.

Source: SL 1985, ch 192, ยง11.