detective
investigator, either a member of a police agency or a private person
Hotel detective
detective that works for a hotel
gentleman detective
type of fictional character
police detective
member of the police force
Adoption detective
an individual who researches biological and genetic connections between individuals
private investigator
person who is not a government official who is hired to provide information about a person or group that is not widely available
Police Chief Master
head of investigations in the German police
Special Investigation Team
Specialized detective units of the Prefectural police headquarters (PPHs) of Japan.
criminalist
profession