Cannibal Ferox

Cannibal Ferox, also known as Make Them Die Slowly, is a 1981 Italian exploitation film written and directed by Umberto Lenzi. Upon its release, the films US distributor claimed it was the most violent film ever made. Cannibal Ferox was also claimed to be banned incountries, some of which lifted their bans only recently.

In Paraguay, siblings Rudy and Gloria and their friend Pat prepare for a journey into the rain forest. They plan to prove Glorias theory that cannibalism is a myth. The trio encounter Mike and his partner Joe. Joe is badly wounded Mike explains that they were attacked by cannibals. During the night, Gloria goes missing and Rudy finds a native village while looking for her.Due to Joes injuries, the travelers decide to stay in the nearly deserted village. Mike seduces the naive Pat. In a cocainefueled rage, he encourages Pat to kill a native girl. She is unable to do it, so Mike kills the girl himself. In his dying moments, Joe reveals that he and Mike were responsible for the cannibals aggression. They came to the region to exploit the natives for emeralds and cocaine, taking advantage of their trust in white men. One day, while high on cocaine, Mike brutally tortured and killed their native guide in full view of the tribe. A badly charred body, previously believed to be that of a different guide, is actually this native. Mike kidnapped a native girl to lead them out of the jungle, but the outsiders were followed and attacked. ........

Source: Wikipedia