(1) A prosecuting attorney may call as a witness, in a special inquiry judge proceeding, any person suspected by him to possess information or knowledge relevant thereto and may issue legal process and subpoena to compel his attendance and the production of evidence.
(2)  The special inquiry judge may cause to be called as a witness any person suspected by him to possess relevant information or knowledge. If the special inquiry judge desires to hear any such witness who was not called by a prosecuting attorney, it may direct the prosecuting attorney to issue and serve a subpoena upon such witness and the prosecuting attorney must comply with such direction.