Comme un boomerang

Movie (1976)
English title: Like a Boomerang

Starring:
Alain Delon (Jacques Batkin)
Carla Gravina (Muriel)
Dora Doll (Ginette, la mère d'Eddy / Eddy's mother)
Louis Julien (Eddy Batkin)
Christian de Tillière (Le juge / The judge)

Under the influence of drugs, a teenager, Eddy, kills a policeman. His father, Jacques, pleads extenuating circumstances and nearly succeeds in gaining the confidence of the policeman's widow. But the press reveals that Jacques is an ex-gangster who has spent time in prison.