Nude Per L'assassino (1975)

Synopsis
A leather-clad killer who hides his identity under a motorcycle helmet goes on a depraved killing spree in this unabashedly sadistic giallo directed by Andrea Bianchi (Burial Ground) and starring Nino Castelnuovo and Femi Benussi. A fashion model has died while receiving an illegal abortion, and after the abortionist is slain, the black-clad killer begins targeting the deceased model's former co-workers. One by bloody one the models begin to fall prey to the mysterious killer, and all of the crimes have one thing in common - the victims were all forced to strip nude before meeting their grim fate. ~ Jason Buchanan, All Movie Guide