Mich. Comp. Laws § 229.3: Jury; oath, duty.

Sec. 3.

Such freeholders, when met, shall be sworn by the commissioner well and truly to examine in regard to the necessity of such road, and in case they shall decide that such road is necessary, to justly and impartially appraise the damages of the owner or owners, or occupant of the land, by reason of laying out such road.