In a Valley of Violence [iTunes HD]

When a drifter wanders into an isolated town that is suspicious of strangers, he and his dog find that this is an easy place to make enemies when he falls into conflict with the marshall's trouble-making son. A sudden and surprising act of violence then makes everyone in the town choose sides between the two men. When the marshall discovers the drifter's secret the situation escalates putting the entire town on a path to destruction and ruin.