Ind. Code § 35-34-2-9
(b) A target of a grand jury investigation shall be given the right to testify before the grand jury, provided he signs a waiver of immunity. The prosecuting attorney shall notify a target of his opportunity to testify unless:
(c) The prosecuting attorney or grand jury may call as a witness in a grand jury proceeding any person believed to possess relevant information or knowledge.
As added by Acts 1981, P.L.298, SEC.3.