Death Carries a Cane (1973)
Death Carries a Cane (Italian title: Passi di danza su una lama di rasoio; UK title: Maniac At Large) is a 1973 Italian giallo film directed by Maurizio Pradeaux. The Italian title translates as Dance Steps on a Razor's Edge, but the film is listed in reference books as Death Carries a Cane.
More at Wikipedia.