The film story depicts Emile Buisson, following the death of his wife and child, escaping from a psychiatric institution in 1947 and returning to Paris. Buisson, who three years later would become France's public enemy number one, begins a murderous rampage through the French capital.

Directed by: Jacques Deray
Written by: Jacques Deray & Alphonse Boudard
Release date: 1975-10-01
Runtime: 112 minutes
Cast:
Alain Delon Alain Delon
Roger Borniche 
Claudine Auger Claudine Auger
Catherine 
Jean-Louis Trintignant Jean-Louis Trintignant
Émile Buisson 
Christine Boisson Christine Boisson
Jocelyne 
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Also known as:
  • Cop Story
  • Der Bulle und der Killer
  • Desafio a la ley
  • Duell in sechs Runden