Michigan Compiled Laws, Chapter 330. Mental Health Code § 330.1427a

Sec. 427a. (1) If a peace officer is taking an individual into protective custody, the peace officer may use that kind and degree of force that would be lawful if the peace officer were effecting an arrest for a misdemeanor without a warrant. In taking an individual into custody, a peace officer may take reasonable steps for self-protection. In transporting an individual, a security transport officer may take reasonable steps for self-protection. The protective steps may include a pat down search of the individual in the individual's immediate surroundings, but only to the extent necessary to discover and seize a dangerous weapon that may be used against the peace officer, security transport officer, or other individual present. These protective steps must be taken by the peace officer or security transport officer before the individual is transported to a preadmission screening unit or a hospital designated by the community mental health services program.

(2) Taking an individual to a community mental health services program's preadmission screening unit or a hospital under section 427  1 by a peace officer is not an arrest, but is a taking into protective custody. The peace officer must inform the individual that he or she is being held in protective custody and is not under arrest. An entry must be made indicating the date, time, and place of the taking, but the entry must not be treated for any purpose as an arrest or criminal record.