Spotlight on a Murderer
Pleins feux sur l'assassin (original)
An old count hides just before he dies to annoy his heirs. The heirs search a manor for the count's body and are killed off one by one. Jean-Marie, his fiancée Micheline, and Edwige investigate the deaths and search for the count's body.
Starring Pierre Brasseur, Pascale Audret, Marianne Koch, Jean-Louis Trintignant, Dany Saval, Jean Babilée, Georges Rollin, Gérard Buhr, Maryse Martin, Philippe Leroy
It's a drama and mystery movie, and has a rating of 6.5 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from United States.