27. At the hearing, the commissioned officer or the discipline committee, as the case may be, must(1) read the citation to the police officer who is the subject of the citation;
(2) allow the police officer who is the subject of the citation to change his or her plea;
(3) allow the police officer who is the subject of the citation to be heard and to defend himself or herself;
(4) accept any evidence considered appropriate and relevant to ensure disclosure of the truth; and
(5) call, question and discharge witnesses, if necessary.