An agency head or a designee shall: Notify the Director or a designee, and if required, local law enforcement, of an allegation required to be reported under Regulation .05 of this chapter; Relinquish authority for an investigation undertaken by the IIU, including an investigation initially assigned to an agency head, or a designee, that is subsequently assumed by the IIU; Provide to the IIU investigator unrestricted access to all areas of the agency head's facility; Ensure that agency employees cooperate with the IIU investigator; If requested by the IIU, assign agency employees to assist the IIU investigator and serve as an IIU liaison; Coordinate agency employee, nonagency employee, and inmate interviews requested by an IIU investigator; Provide reports, documents, and information requested by an IIU investigator; Ensure confidentiality of all reports, records, investigative activities, and documents relating to an IIU investigation; Provide workspace within the facility for use by the IIU personnel during an investigation; Secure and preserve the scene of an incident until released to an IIU investigator or appropriate law enforcement personnel; and Be accountable for investigations conducted at the agency level ensuring that: Where appropriate, investigative activities are conducted according to requirements for an IIU investigator; Required reports are completed; and Investigative reports are forwarded to the Director, or a designee, for review, filing, and retention.