Naked Vengeance(1985)

After witnessing her husband's brutal murder, Carla travels to her parents' home in a small mountain town to start over. When she's repeatedly harassed by redneck locals, Carla seeks help from the town sheriff but is met with indifference. This continues until Carla's finally attacked, raped, and her parents executed by the twisted townies. Carla, after escaping a mental hospital, resolves to get bloody revenge.