A.k.a. UNA FARFALLA CON LE ALI INSANGUINATE. A young girl has her throat slashed in a heavily wooded area. The killer escapes and there are several witnesses who all believe they can identify the killer. A man is arrested and locked away in prison, but the murders continue. Evidence at the scene causes the police to release the convicted man, but in a strange twist ending we see this may have been a big mistake. This is one of the best giallos ever made and was directed by the increasingly popular Duccio Tessari. Written by Gianfranco (Cannibal Holocaust) Clerici. Starring Helmut Berger, Evelyn Stewart and Carole Andre. (1972-Italy/Germany) Widescreen in English.