32 CFR 312.13 - Ownership of OIG investigative records.
(a) Criminal and or civil investigative reports shall not be retained by DoD recipient organizations. Such reports are the property of OIG and are on loan to the recipient organization for the purpose for which requested or provided. All copies of such reports shall be destroyed within 180 days after the completion of the final action by the requesting organization.
(b) Investigative reports which require longer periods of retention may be retained only with the specific written approval of OIG.