(1) One or more judges of a judicial district may designate a judge pro tempore or a special master in a criminal case to hear and determine any preliminary, nondispositive matter pending in a criminal case before the court if the district court judge or judges find that the appointment serves justice.
(2) Any of the following individuals may act as a special master in a criminal case:
(a) a justice of the peace or a city judge;
(b) a retired district court judge;
(c) a retired supreme court justice; or
(d) a member of the state bar.