Mich. Comp. Laws § 766.8

Sec. 8. The person accused may be committed as provided in the preceding section, by the verbal order of the magistrate, or by a warrant under his hand, stating that he is committed for such further examination on a day to be named in the warrant; and on the day therein specified, he may be brought before the magistrate by his verbal order to the same officer by or to whose custody he was committed, or by an order in writing to a different officer.