Moon of the Wolf (1972)

Creepy little movie concerning a highborn Louisiana family with a dark secret. After a local girl is found mutilated in a nearby bayou, local sheriff (Janssen) must use all his detective skills to solve the crime. His investigation leads him to an old flame (Rush) and her aristocratic brother (Dillman) who are both keen for the culprit to be caught, but for different reasons. Everyone’s a suspect including the local medical examiner, who can’t seem to determine the cause of death, while the paranormal activity leads to more mysterious victims. Starring David Janssen, Barbara Rush, and Bradford Dillman. One of the best werewolf movies of the 1970s!