Qualcuno ha tradito (1967)
Directed by Franco Prosperi

Film Synopsis

Tough American hoodlum Tony Costa has high ambitions when he arrives in the south of France in preparation for his next big job.  His intention is to pull off the crime of the century, which given his remarkable safecracking skills is certainly an achievable objective.  Tony is not a man who does things by halves.  He believes that if you are a crook you are a crook for life.  To him, there is nothing more contemptible than a crook who goes straight.  It is the worst kind of treason.  He is busy preparing for his ambitious heist when he comes into contact with one of his old criminal associates.  To Tony's infinite disgust, the latter has given up his old life of crime and is now a police chief.  This revelation is more than he can stomach...