Tomb of the Pistolero (1964)

Tom Bogard travels from Boston to the small western mining town of Carson, where on arrival he mentions he is the brother of Jack Bogard, who was assassinated a few weeks ago, he then is completely shut out. By no means anxious to leave, Tom begins to look for people who will be able to tell him about the death of his brother...

Unfortunately the movie Tomb of the Pistolero is not yet available on HBO Max.