Mich. Comp. Laws § 14.142
Upon demand of the attorney general, the auditor general or any person designated by him for the purpose of this act or of the prosecuting attorney as provided in section 1, it shall be the duty of any and all officers of the township or school district wherein such investigation, examination and/or audit is sought to be made to produce, for inspection and examination, the books of account and papers of their respective offices, and to truthfully answer all questions relating thereto. In connection with such examination, the attorney general, auditor general, or any person designated by him to make such investigation, examination and/or audit, or the prosecuting attorney, may issue subpoenas, direct the service thereof by any police officer, and compel the attendance and testimony of witnesses, may administer oaths and examine such persons as may be necessary, and may compel the production of books and papers. The orders and subpoenas issued by any person charged with the duty of making the investigation, examination and/or audit herein provided, in pursuance of the authority in them vested by provision of this section, may be enforced upon their application to any circuit court by proceedings in contempt therein, as provided by law.
MCL 14.142