un policier or un gendarme (the latter being a countryside policeman)
La police is the french word for police.
prefet de police
The root word of "police" is from the French word "police," which originally meant "public order" and "government."
Un inspecteur de police.
police (la police) There are also a bunch of slang words for the police too, just like in America
Slang for police - cop
If you are looking for a six letter word for a cross word puzzle it is SURETE, or Police Judicaire
The word you're looking for is likely "flic," which is a slang term for a French police officer.
Flic is a slangish term for a policeman in French. The English equivalent is 'cop'.
1. a police surveillance of an area, house, or criminal suspect: une planque (police jargon), une surveillance 2. an area or house kept under such surveillance: un objectif, une cible (both somewhat police slang) [English definitions are from Dictionary.com]
'une unité d'investigation / un groupe d'investigation'
The English word for a Parisian cop is "police officer" or simply "cop." In a more colloquial context, they can also be referred to as "flic," which is a French slang term for police. However, the formal title in English remains "police officer."