(a) Each facility shall maintain in a secure area all case records associated with claims of sexual abuse, including incident reports, investigative reports, offender information, case disposition, medical and counseling evaluation findings, and recommendations for post-release treatment, if necessary, and/or counseling in accordance with these standards and applicable agency policies, and in accordance with established schedules. The DHS Office of Inspector General shall maintain the official investigative file related to claims of sexual abuse investigated by the DHS Office of Inspector General.