Billy claimed to have shot Roberts because he THOUGHT he did, but he was wrong. According to George and Frank Coe, Charlie Bowdre fired the shot that killed him. Frank was sitting on the steps to Blazer's office trying to talk Buckshot into surrendering when Bowdre, George Coe, and John Middleton came around the corner of the building and ordered Roberts to give up. Roberts rose to his feet, brought his winchester to his hip and he and Bowdre fired at the same time. Bowdre's bullet hit Roberts in the groin just above the hips. In Frank Coe's words. "the dust flew from his clothes on both sides". Roberts bullet hit Charlie's belt buckle, smashing it and dropping his pistol belt to the ground. The bullet then glanced into George Coe's right hand mangling his index finger, resulting in the need to amputate the digit. Roberts went on to wound Middleton and Doc Scurlock in the barrage of gunfire. After the first shots, the other regulators joined in. As Buckshot backed into Dr. Blazer's office, the Kid made a dash at him thrusting the barrel of his rifle at Roberts and pulling the trigger. At the same time, Roberts jammed the barrel of his own empty rifle into the Kid's ribs, knocking the breath out of him and deflecting his aim. Billy's bullet hit the door frame and NOT Roberts, though Billy believed he had hit him. As the Kid retreated, Roberts barricaded the door of Blazer's office with a mattres from a cot and found a springfield officer's model carbine (according to Dr. Blazer's grandson) on the wall. He also found a box of ammo for it. Roberts ends up killing Dick Brewer. After the loss of their leader, the regulators left Blazer's Mill and Buckshot Roberts died the next day.
For Beckwith, he led posse members into McSween's yard after the breakout. The Kid and the other few that made it out were already gone. McSween yells that "I shall surrender". Beckwith and a couple others enter the yard and confront McSween and three or four regulators. McSween suddenly yells " I shall never surrender". Both sides opened fire at point blank range. Beckwith fell with a bullet in his eye. McSween fell with five bullets in him. Three regulators were killed and one was wounded( Yginio Salazar)