Longarm's out to discover who gunned down a fellow lawman.Sheriff Des Rainey was a good lawman, just doing his job, returning from a ranch left in charred ruins after giving the murdered corpses left behind a decent burial. But someone got the drop on him as he was stepping into his own jailhouse-and a shotgun blast blew him clear back out into the muddy main street of Diamondback. Rainey was a good friend of Marshal Billy Vail. They'd served as Texas Rangers together. So Billy sent his best deputy marshal to find the killer who made Mrs. Rainey a widow. But when Longarm rides into Diamondback, no one's talking-except the young, beautiful widow herself, who will do anything to get Longarm to find her husband's killer…