S.D. Codified Laws § 34-35-13 (2026)
It shall be the duty of every county sheriff, whenever complaint is made to him of the violation of any provisions of § 34-35-10, to diligently investigate such charge or charges, to ascertain whether any of the provisions of said section have been violated and to make a full and complete report thereof to the state's attorney who shall diligently prosecute anyone violating any of the provisions of said section.
Source: SDC 1939, § 20.0208 as enacted by SL 1955, ch 66 , § 7.