Indiana Code Title 22. Labor and Safety § 22-4-17-9

Sec. 9. No person shall be excused from attending and testifying or from producing books, papers, correspondence, memoranda, and other records before the department, the review board, an administrative law judge, or the duly authorized representative of any of them, in obedience to the subpoena of any of them in any cause or proceeding before any of them on the ground that the testimony or evidence, documentary or otherwise, required of the person may tend to incriminate the person or subject the person to a penalty or forfeiture, but no individual shall be prosecuted or subjected to any penalty or forfeiture for or on account of any transaction, matter, or thing concerning which the person is compelled after having claimed the privilege against self-incrimination to testify or produce evidence, documentary or otherwise, except that such individual so testifying shall not be exempt from prosecution and punishment for perjury committed in so testifying.  Any testimony or evidence submitted in due course before the department, the review board, an administrative law judge, or any duly authorized representative of any of them, shall be deemed a communication presumptively privileged with respect to any civil action except actions to enforce the provisions of this article.