S.D. Codified Laws § 26-7A-17
The officer or party who takes a child into temporary custody, with or without a court order, except under a court order issued during a noticed hearing after an action has been commenced, shall notify the state's attorney at the earliest opportunity of the time the child was taken into temporary custody and the location of the child. The officer or party shall also file a written report promptly with the state's attorney stating the facts which caused placement of the child in temporary custody, the identity and age of the child, available information about identities and locations of the child's parents, guardian, or custodian and if the parties were notified of the action. The state's attorney shall promptly notify the court.
SDCL 26-7A-17