Four Flies on Grey Velvet (1971)

Roberto, a drummer in a rock band, keeps receiving weird phone calls and being followed by a mysterious man. One night he manages to catch up with his persecutor and tries to get him to talk but in the ensuing struggle he accidentally stabs him. He runs away, but he understands his troubles have just begun when the following day he receives an envelope with photos of him killing the man. Someone is killing all his friends and trying to frame him for the murders.
Dario Argento, Roberto Pariante, Patrizia Zulini
Michael Brandon, Mimsy Farmer, Jean-Pierre Marielle, Aldo Bufi Landi, Calisto Calisti, Marisa Fabbri, Oreste Lionello, Fabrizio Moroni, Corrado Olmi, Stefano Satta Flores, Laura Troschel, Francine Racette, Bud Spencer, Dante Cleri, Guerrino Crivello, Gildo Di Marco, Tom Felleghy, Leopoldo Migliori, Fulvio Mingozzi, Stefano Oppedisano, Pino Patti, Ada Pometti, Jacques Stany, Fortunato Cecilia, Franz Colangeli, Shirley Corrigan, Luigi Cozzi, Giovanni Di Benedetto, Sandro Dori, Renzo Marignano, Quinto Marziali, Diego Morreale, Anna Maria Perego, Pupita Lea Scuderoni, Maurizio Streccioni, Lella Cattaneo
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