Answer: detective

AnswerCrossword Clue
DETECTIVEWhodunit hero
detectiveone who investigates crimes, obtains evidence, etc.
detectivea policeman, usually not in uniform, or other person (private detective) who investigates cases of crime
DETECTIVEInvestigator
DETECTIVEPeter Gunn e.g.
DETECTIVE23-Across's occupation
DETECTIVEProtector of the public
DETECTIVEDupin or Lupin.
DETECTIVEMember of the police department.
DETECTIVEDICK
DETECTIVEPrivate investigator
DETECTIVESpade or Marlowe
DETECTIVE29-Down's job
DETECTIVETracy?
DETECTIVEQueen, for one
DETECTIVE"Shamus"
DETECTIVEPI