- An investigator - Crime investigator - person looking for someone or something that's missing - Shamus - Sleuth - Fitted for, or skilled in, detecting; employed in
detecting crime or criminals; as, a detective officer. - One who business it is so detect criminals or discover
matters of secrecy.
- Interrogator - Official investigator - An inquisitive person; one fond of asking questions. - One whose official duty it is to examine and inquire,
as coroners, sheriffs, etc. - A member of the Court of Inquisition.
- An investigator - Checker - Copper prices not to be tampered with - Examiner - One who examines - Police officer adopted crisp tone - Prison, etc, bothered police officer