The Flower with the Deadly Sting

A wealthy doctor Andrea Valenti (Gianni Garko) accidentally kills his mistress, then the doctor falls victim of blackmail. A well known surgeon Andrea Valenti (Gianni Garko) accidentally kills his mistress with a metal sculpture of a flower, later he tries to cover-up his crime never realizing he's being watched by someone lurking, then he begins receiving menacing phone calls from an alleged witness. Who could it be behind the blackmail? —jairhcastillo