Mich. Comp. Laws § 49.11
Prosecuting attorney; preparation of briefs, attendance at criminal proceedings on supreme court, duties, compensation and expenses.
That in all criminal proceedings removed to the supreme court by writ of error, mandamus or otherwise, it shall be the duty of the prosecuting attorney of the county from which any cause is so removed to prepare a brief on behalf of the people therein, and to furnish the same to the attorney general where such cause is…