Mort d’un Pourri - 1977 - 7/10
AKA - Death Of A Corrupt Man

A politician / bureaucrat / fixer is murdered.
Police inspectors realize his important diary has gone missing.
The book with dirt on legislators, tycoons, aristocrats.
Police, enforcers and envoys quickly swarm around the likely suspects.
Safest thing would be to turn the book in. The dangerous route is more lucrative.
Nasty French mystery thriller is a sour study of greedy, bribery, murder, and dishonesty.
Alain Delon excellent as friend in over his head. Klaus Kinski memorable as jaded middleman.