Investigative journalism
Naval Criminal Investigative Service
International Consortium of Investigative Journalists
Federal Bureau of Investigation
Investigation Discovery
Investigator
National Investigation Agency
Private investigator
Crime & Investigation
Director of the Federal Bureau of Investigation
Air Accidents Investigation Branch
Investigations Police of Chile
Air Crash Investigation
The Three Investigators
Central Bureau of Investigation
Deputy Director of the Federal Bureau of Investigation
Geotechnical investigation
CSI: Crime Scene Investigation
Crime Investigation Department (Pakistan)
NIOSH
Air Crash Investigation Special Report
Ace Attorney Investigations: Miles Edgeworth
Directorate for Investigating Organized Crime and Terrorism
Smart Lander for Investigating Moon
Journalist
Clodomiro Picado
Rail transport