(1) At the request of a party the court shall order, or upon its own motion the court may order, witnesses excluded from a proceeding so that they cannot hear the testimony of other witnesses except as provided in subsection (2).
(2) A witness may not be excluded if the witness is:
(a) A party who is a natural person.
(b) In a civil case, an officer or employee of a party that is not a natural person. The party’s attorney shall designate the officer or employee who shall be the party’s representative.
(c) A person whose presence is shown by the party’s attorney to be essential to the presentation of the party’s cause.
(d) In a criminal case, the victim of the crime, the victim’s next of kin, the parent or guardian of a minor child victim, or a lawful representative of such person, unless, upon motion, the court determines such person’s presence to be prejudicial.