Profondo rosso (Deep Red)

The killer is Carlo's (Gabrele Lavia's) ecentric mother Marta (Clara Calamai). As a young boy, Carlo witnessed his mother kill his father on Christmas Eve and helped her wall the body up in their mansion. When the secret became known to medum Helga Ulmann (Macha Meril), Marta killed her and anyone else who tried to uncover her past. In the double climax, Carlo is accidently caught on the fender of a garbage truck and dragged down a street to his death, while Marta is decapited by an elevator before she can kill Marcus (David Hemmings).
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