Ind. Code § 6-8.1-3-12
(c) For purposes of conducting its audit or investigative functions, the department may:
(3) question witnesses under oath.
The department may serve its subpoenas, or it may order the sheriff of the county in which the witness or evidence is located to serve the subpoenas.
(e) Upon receiving a proper petition under subsection (d), the court shall promptly issue an order which:
(2) orders the person to appear at the hearing prepared to produce the subpoenaed evidence and give the subpoenaed testimony.
If the defendant is unable to show good cause for not producing the evidence or giving the testimony, the court shall order the defendant to comply with the subpoena.
(h) County treasurers investigating tax matters under IC 6-9 have:
(3) authority to recover court costs, fees, and other expenses related to an audit, investigatory, appraisal, or enforcement action under this section.
As added by Acts 1980, P.L.61, SEC.1. Amended by P.L.71-1993, SEC.16; P.L.254-2003, SEC.9; P.L.182-2009(ss), SEC.249.