Detective

Carries out investigations to prevent crimes or solve criminal cases...

Carries out investigations to prevent crimes or solve criminal cases: Investigates known or suspected criminals or facts of particular case to detect planned criminal activity or clues. Frequents known haunts of criminals and becomes familiar with criminals to determine criminals' habits, associates, characteristics, aliases, and other personal information. Records and reports such information to commanding officer. Investigates crimes and questions witnesses. Examines scene of crime to obtain clues and gather evidence. Investigates suspected persons and reports progress of investigation. Arrests or assists in arrest of criminals or suspects. Prepares assigned cases for court, according to formalized procedures. Testifies before court and grand jury. May be designated according to nature of crime investigated as Detective, Automobile Section (government ser.); Detective, Homicide Squad (government ser.); according to rank as Detective Sergeant (government ser.) II; or according to administrative division to which assigned as Detective, Precinct (government ser.); Detective, Youth Bureau (government ser.).