Sette Scialli Di Seta Gialla (1972)

aka’s: 7 Mord I København/Seven Shawls Of Yellow Silk/The Crimes Of The Black Cat

A blind pianist (Anthony Steffen) tries to figure out who is responsible for a string of murders, including that of his girlfriend, using a black cat with its caws dipped in curare. Also stars Sylva Koscina and Jeannette Len. (In Italian language, with English subtitles).