(1) At the request of a party, the judge or a circuit court commissioner shall order witnesses excluded so that they cannot hear the testimony of other witnesses. The judge or circuit court commissioner may also make the order of his or her own motion.
(2) Subsection (1) does not authorize exclusion of any of the following:
(a) A party who is a natural person.
(b) An officer or employee of a party which is not a natural person designated as its representative by its attorney.
(c) A person whose presence is shown by a party to be essential to the presentation of the party’s cause.
(d) A victim, as defined in s. 950.02 (4), in a criminal case or a victim, as defined in s. 938.02 (20m), in a delinquency proceeding under ch. 938, unless the judge or circuit court commissioner finds that exclusion of the victim is necessary to provide a fair trial for the defendant or a fair fact-finding hearing for the juvenile. The presence of a victim during the testimony of other witnesses may not by itself be a basis for a finding that exclusion of the victim is necessary to provide a fair trial for the defendant or a fair fact-finding hearing for the juvenile.
(3) The judge or circuit court commissioner may direct that all excluded and non-excluded witnesses be kept separate until called and may prevent them from communicating with one another until they have been examined or the hearing is ended.