Mich. Comp. Laws § 432.20: Subpoenas.

Sec. 20.

The circuit court upon petition of the commissioner after a hearing may issue subpoenas to compel the attendance of witnesses and the production of documents, papers, books, records and other evidence before it in any matter over which it has jurisdiction, control or supervision. If a person subpoenaed to attend in any such proceeding or hearing fails to obey the command of the subpoena without reasonable cause, or if a person in attendance in any such proceeding or hearing refuses, without lawful cause, to be examined or to answer a legal or pertinent question or to exhibit any book, account, record or other document when ordered to do so by the court may be punished as a contempt of the court.