One Bloody Day — Robert Kammen

Cal McCann didn't have that much of a past coming onto his twentieth birthday, but what he'd done over this long summer had drifted back to haunt the young waddy. His first mistake had been to lay over at Rawlins for a boisterous weekend after helping hold up the Citizens Bank of Wahsatch, a Mormon settlement lying just across the border in Utah. Another glaring miscue, McCann's encounter with a woman of pleasure, had been just pure and simple youthful ignorance, but had put U.S. Marshal Homer Risdale on his trail: Selma Higgins had turned out to be the steady girlfriend of the Rawlins town marshal.