Mich. Comp. Laws § 750.408

Sec. 408. Any person who shall conceal or harbor any soldier or volunteer enlisted in the service of the United States, or of this state, knowing him or her to have deserted, and with intent to aid him or her in such desertion, or shall refuse to deliver him or her up to the orders of his or her commanding officer, is guilty of a misdemeanor punishable by imprisonment for not more than 1 year or a fine of not more than $1,000.00.