S.D. Codified Laws § 26-8A-9
Upon receipt of a report pursuant to § 26-8A-8, the Department of Social Services or law enforcement officers shall investigate. Investigating personnel may personally interview a child out of the presence of the child's parents, guardian, or custodian without advance notice or consent. The investigation does not prohibit any other lawful action. If the investigation and report indicate that child abuse or neglect has occurred, the state's attorney shall take appropriate action immediately. The court may appoint an attorney, guardian ad litem, or special advocate to assist in representing the best interests of the child. Any such appointment shall occur in the manner the county in which the action is being conducted has chosen to provide indigent counsel under § 23A-40-7. Compensation and expense allowances for the child's attorney, guardian ad litem, or special advocate shall be determined and paid according to § 26-7A-31.
SDCL 26-8A-9