The Man from Laramie (1955)

Mysterious Will Lockhart delivers supplies to storekeeper Barbara Waggoman at Coronado, an isolated town in Apache country. Before long, he's tangled with Dave Waggoman, vicious son of autocratic rancher Alec and cousin of sweet Barbara. But he sticks around town, his presence a catalyst for changes in people's lives, searching for someone he doesn't know...who's been selling rifles to the Apaches.