On the written request of a respondent or a child, the state's attorney shall permit the respondent or child to inspect and copy or photograph any relevant written or recorded statements made by any respondent or child or copies of such statements in the possession, custody, or control of the state, the existence of which is known or by the exercise of due diligence may become known to the state's attorney and the substance of any oral statement which was made by any respondent or child in response to interrogation by any person then known to the respondent or child to be an employee of the state or of a department or agency of the state and which the state's attorney intends to offer in evidence at the hearing.
SDCL 26-7A-58