Mich. Comp. Laws § 750.499: False active shooter alarm; violation as misdemeanor.

Sec. 499.

(1) A person who knowingly and willfully raises a false active shooter alarm in a public place, including, but not limited to, a school, is guilty of a misdemeanor punishable by imprisonment for not more than 1 year and a fine of not more than $1,000.00.

(2) As used in this section, "active shooter alarm" means an alarm system that is designed to alert individuals inside that place that there is an active shooter on or near the premises, including an alarm system that when activated locks doors, informs local law enforcement of the active shooter, flashes a blue light, or broadcasts a message inside the place indicating the presence of an active shooter.