Reprisal! (1956, U.S.A.)

Frank Madden (Guy Madison) is part Native American but passes as white. He purchases a ranch in the small town of Kendall. However, when he moves in, he finds that three brothers, who are also his neighbours, get away with the lynching murder of innocent Native Americans. Sadly, the bigoted town folk lets them get away with it. Tensions between the townspeople and local Native Americans rise. Meanwhile, Hank becomes torn between fighting against injustice and keeping his true identity a secret.