Saga of Death Valley (1939)

"Saga of Death Valley" is a 1939 Western movie directed by Joseph Kane and starring by Roy Rogers, George 'Gabby' Hayes. When Tasker kills Roy Rogers he takes one of his young sons. Fifteen years later the other son Roy arrives buying a ranch in the valley where Tasker now controls the water supply. Roy organizes the ranchers for a showdown with Tasker not knowing that his brother is Tasker's chief henchman.