The director Philippe Labro was a journalist in Dallas, when John F Kennedy was killed and he was also in the police station where Lee H Oswald was shot by Jack Ruby. That's why he was inspired by this scene for the last minutes of his film.
14th highest grossing movie of the year in France.
Pierre Grasset plays a character with the same name, "Pierre Delmas" in Jean-Pierre Melville's 1959 film noir Two Men in Manhattan (1959).