Michigan Compiled Laws, Chapter 201. Vacancies in Office § 201.8

Sec. 8. The attorney general or prosecuting attorney may issue subpoenas, signed by him with his name of office, to compel the attendance of any witness whom he shall deem material, before said circuit court commissioner or judge of probate, and such commissioner or judge of probate shall have the same power to enforce obedience to such subpoena by attachment, and to commit any person who shall refuse to be sworn or to answer, as the circuit court would have in a civil cause pending therein, and the fees of such witnesses shall be the same as in civil cases, and shall be a charge against the county.