The Killing Shot — Johnny D. Boggs

In 1880's Arizona Territory, a good man goes bad -- but for the best of all reasons...
He's Got One Chance To Live...And A Hundred Ways To Die
Deputy U.S. Marshal Reilly McGilvern is hauling criminals to Yuma when his prison wagon is attacked, and McGilvern is left locked inside to die. When another outlaw gang comes upon the scene, Reilly McGilvern thinks he's lived to see another day...but his problems are just beginning.

Bloody Jim Pardo wants to avenge the Civil War -- and to steal the kind of weapons that will let him do it. Riding with his mother, his trusted killers and two hostages, Pardo thinks McGilvern is a fearsome criminal. Now, to stop Jim Pardo's bloody madness, McGilvern needs to play his part perfectly. And when the time comes, make every shot a killing shot...