Chinaville by J. R. Roberts
Deciding to lay low for a while, Clint accepts a friend's challenge to make his living as a gambler. He sets out for Chinaville, Colorado, where the money is flowing freely from a nearby gold strike. His luck is cut short when a miner who accuses him of cheating is found dead, shot in the back. Now, Clint is on the run from three vengeful brothers and a cousin.