The person appointed to conduct the superintendent's hearing shall be either the superintendent, a deputy superintendent, captain or commissioner's hearing officer employed by the department's central office, but the superintendent may, in his or her discretion, designate an employee who holds a title that has been approved by central office to conduct the proceeding. The following persons shall not be appointed to conduct the proceeding: a person who actually witnessed the incident; a person who was directly involved in the incident; the review officer who reviewed the misbehavior report, or a person who has investigated the incident. Prior to presiding over a superintendent’s hearing, the hearing officer shall receive training on relevant topics, including implicit bias and procedural due process rights.