special agent; special investigator
Refers to a law enforcement or government official with special investigative authority, often used in contexts like FBI, CIA, or similar agencies.
An FBI special agent is in charge of the case.
Special investigators can access classified information.
捜査官 is a general investigator, while 特別捜査官 specifically denotes a special agent with elevated authority or a specialized role.
Compound of 特別 (special) + 捜査 (investigation) + 官 (official). A straightforward modern term for a special investigative officer.