Department of Defense Instruction 5240.04: Counterintelligence (CI) Investigations [open pdf - 95KB]
"This Instruction reissues DoD Instruction (DoDI) 5240.4 (Reference (a)), implements the policy in DoD Directive (DoDD) O-5240.02 (Reference (b)), and assigns responsibilities and establishes procedures for conducting CI investigations within the Department of Defense in accordance with the authority in DoDD 5143.01 (Reference (c)). This Instruction: a. Applies to OSD, the Military Departments, the Office of the Chairman of the Joint Chiefs of Staff and the Joint Staff, the Combatant Commands, the Office of the Inspector General of the Department of Defense, the Defense Agencies, the DoD Field Activities, and all other organizational entities within the Department of Defense (hereafter referred to collectively as the 'DoD Components'). b. Addresses CI investigations under the purview of the Under Secretary of Defense for Intelligence (USD(I)), but not criminal investigations of a non-CI nature. c. Does not pertain to CI inquiries.[...]. It is DoD policy that CI investigations shall be conducted in accordance with Reference (b) and shall only be conducted by the Military Department CI organizations identified in the 'Memorandum of Agreement Between the Attorney General and the Secretary of Defense' (Reference (d)) and the 'Memorandum of Understanding Between the FBI and the Department of Defense' (Reference (e))."
DoD Instruction 5240.04; DoDD 5240.04
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/