Mich. Comp. Laws § 324.76508
The director may appoint, by and with the consent of the commission, such number of special police as the commission may by resolution direct, which special police shall be under the supervision and direction of the director, who shall be charged with the enforcement of the laws of this state related to the park and the rules promulgated by the commission for the care and preservation of the park, and the property in and about the fort. The special police shall be vested with the authority of county sheriffs and, within the park, may apprehend and arrest, without warrant, any person whom they may find violating the laws of this state related to the park or the rules that have been promulgated concerning the preservation of property, the mutilation of landmarks, or the destruction or injury to growing trees and shrubs.
MCL 324.76508