State law requires districts to establish formal procedures governing referrals to local law enforcement.
Michigan Compiled Laws 380.1308 Statewide school safety information policy
(9) A school board shall cooperate with local law enforcement agencies to ensure that detailed and accurate building plans, blueprints, and site plans, as appropriate, for each school building operated by the school board are provided to the appropriate local law enforcement agency.
Michigan Compiled Laws 380.1313. Dangerous weapon found in possession of pupil; report; confiscation by school official; determination of legal owner; “dangerous weapon” defined.
(1) If a dangerous weapon is found in the possession of a pupil while the pupil is in attendance at school or a school activity or while the pupil is enroute to or from school on a school bus, the superintendent of the school district or intermediate school district, or his or her designee, immediately shall report that finding to the pupil’s parent or legal guardian and the local law enforcement agency.