S.D. Codified Laws § 22-16-20.1 (2026)
Murder in the second degree is a lesser included offense of murder in the first degree. Manslaughter in the first degree is a lesser included offense of murder in the first degree and murder in the second degree. Manslaughter in the second degree is a lesser included offense of murder in the first degree, murder in the second degree, and manslaughter in the first degree.
Source: SL 2005, ch 120 , § 436.