Torso (1973)

(aka) I corpi presentano tracce di violenza carnale . Someone is strangling coeds in Perugia. The only clue is that the killer owns a red and black scarf, and police are stumped. American exchange student Jane and her friends decide to take a break from classes by going up to Danielle's uncle's villa in the country. Unfortunately the killer decides to follow, and the women begin suffering a rapid attrition problem.