Michigan Compiled Laws, Chapter 752. Crimes and Offenses § 752.843

Sec. 3. Every person who shall have caused or been involved in an accident in which a human being was killed or injured by means of a firearm, shall, in addition to complying with the provisions of section 2 of this act,  1 immediately thereafter report such injury or death to the nearest office of the state police, or to the sheriff of the county wherein the death or injury occurred, unless such person be physically incapable of making the required report, in which event it shall be the duty of such person or persons to designate an agent to file the report. It shall be the duty of the sheriff, upon receipt of the report herein required, to transmit the same forthwith to the nearest office of the state police.