Indiana Code Title 35. Criminal Law and Procedure § 35-34-2-9

Sec. 9. (a) Except as provided by subsection (b) of this section, no person has a right to appear as a witness before the grand jury or to present any evidence or information to the grand jury.

(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.