Code of the Rangers (1938)

Brothers Tim and Jack are Rangers after Blackie Miller. When Tim learns Jack broke one of Miller's men out of jail, he doesn't report it but has him resign. Later when the bank is robbed, Tim gives chase and catches Jack with the loot. Protecting Jack again, he poses as the robber and goes to prison. Quickly pardoned he catches up with Jack and when Miller's men attack, Jack gets a chance to repay him.