Michigan Compiled Laws, Chapter 600. Revised Judicature Act of 1961 § 600.1371

(i) Jury service is completed when the first trial to which the juror is sworn in concluded regardless of the length of the trial or the manner in which the case is disposed.

(ii) A juror who is challenged shall be returned to the jury pool and shall be subject to voir dire examination in other cases for the remainder of that day.

(iii) A juror who remains unseated and unchallenged at voir dire examination shall be excused at the end of that day. A juror may be held over for another day for continuation of voir dire examination at the discretion of the trial judge.