Mich. Comp. Laws § 600.1825

Sec. 1825. (1) Every elector is privileged from arrest while going to, attending, and returning from elections in all cases except for treason, felony, or breach of the peace. (2) Senators and representatives are privileged from arrest during sessions of the legislature and for 15 days next before the commencement and after the end of each session. (3) All officers, warrant officers, and enlisted personnel who are in the actual service of this state or the United States are privileged from arrest and imprisonment during the time of their actual service except for treason, felony, or breach of the peace.