In any proceedings under this chapter and chapters 26-8A , 26-8B , and 26-8C , no statement in the possession of the state's attorney which was made by a witness or prospective witness of the state or any department or agency of the state, other than a respondent or a child, may be the subject of subpoena, discovery, or inspection until the witness has testified on direct examination in the adjudicatory hearing. Source: SL 1991, ch 217 , § 69F.