Vergeltung am Teufelssee
The Secret of Convict Lake (original)
Starring Glenn Ford, Gene Tierney, Ethel Barrymore, Zachary Scott, Ann Dvorak, Barbara Bates, Cyril Cusack, Richard Hylton, Helen Westcott, Jeanette Nolan
It's a western movie, and has a rating of 6.9 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Germany.