La Balance (1982)

https://filmow.com/la-balance-t52853/ Nicole is a Parisian streetwalker and Dede is her racketeer boyfriend, on the outs with his mob bosses because of a dispute over Nicole. When a police informant ("balance") is murdered, the cops have to scramble for a replacement. Deciding on Dede, they begin to put a nasty squeeze on him and Nicole The Nark La Balance