Pleins feux sur l'assassin (1961)

Pleins feux sur l'assassin (1961) is a strange thriller mystery horroresque French film noir nest of vipers-style rural chateau based tale of twisted and messed up tale of bereavement and greed, which speaks of mortality, intense hatred, evil old age male spite and 

It is a film not entirely within the French New Wave, and yet one which does display strong noir tropes, and at the same time seems to look at Jean Cocteua or Marcel Carne as inspiration rather than indulging in the deconstructions of the contemporary French class-acts such as Godard and Truffaut.