Sans mobile apparent

... and his best.All that he made afterward can easily be dismissed as rubbish.A journalist -he also wrote words for some songs- he dreamed of the American cinema because he spent some of his youth on the other side of the pond.

Actually,we're closer to Agatha Christie's whodunit than to American film noir.It's not a problem.It's better to have a good imitation of a detective story à la "and then there were none" than a pale reflection of Wise or Hawks.One by one,people who did something nasty in the past are slain and detective Trintignant is here to solve the mystery ,a mystery which entertains the audience till the very end .Outside Trintignant,the cast is very odd,including French crooner Sacha Distel,as an emcee of a stupid radio contest (a wonderful spoof) ,Segal, who wrote "love story" ,Chabrol's then-wife (and ex-wife of Trintignant)and best actress Stephane Audran,Italian not yet sex symbol Laura Antonelli ,here cast against type,Jean-Pierre Marielle...

Very entertaining.