An IIU investigator: Shall have unrestricted access to all areas of a Department facility; In addition to the authority under Regulation .06 of this chapter, may: Access Department records; Request assistance from an agency employee; Request assistance from another law enforcement agency; Inspect facilities, vehicles, or equipment; and Require an employee to provide testimonial or physical evidence; and Shall: Conduct an investigation in an impartial and reasonable manner according to the oath of office and law of the United States and the State; Be courteous, attentive, and receptive to an individual reporting or providing evidence related to a complaint under investigation; Ensure the safety and chain of custody for items and evidence received; Maintain confidentiality of all matters related to investigations; and Prepare an investigative report that, at a minimum, contains: Complete and detailed information regarding the complaint or incident; A clear account of investigative actions; and All relative information supporting the finding.