Investigator was a position, usually in a police force. An investigator was responsible for investigating crimes and various incidents. (TNG: "A Matter of Perspective"; VOY: "Riddles"; ENT: "The Forge")
Notable investigators
- Chief Investigator Krag (Tanugan security force)
- Chief Investigator Stel (Vulcan Security Directorate)
- Deputy Investigator Naroq (Kesat Security)