Special Investigation or Special Investigations may refer to:
Department of Special Investigation, a Thai security service Special Investigation Branch, the British armed forces military police CID Special Investigations Department (Brazil), a part of the Civil Police Special Investigation Group, a New Zealand governmental security group Special Investigation Team (India)
See also
Special Criminal Investigation, a 1989 arcade game Special Investigations Unit (disambiguation) Special Investigations Bureau (disambiguation) Special Investigations Division (disambiguation) Office of Special Investigations (disambiguation) Special Investigations Section (disambiguation)