Mich. Comp. Laws § 338.3306

Sec. 306. Upon application by the attorney general or a party to a contested case, the circuit court may issue a subpoena requiring a person to appear before a hearings examiner in the contested case or before the department in an investigation and be examined with reference to a matter within the scope of that contested case or investigation and to produce books, papers, or documents pertaining to that contested case or investigation.