While accompanying his brother Virgil to the rail head in Tucson, Wyatt spotted Frank Stilwell lying in wait. He was a suspect in Morgan's assassination. Wyatt and others pursued Stilwell and killed him. Earp then assembled and deputized a federal posse. They set out to track down others they believed responsible for shooting Virgil and killing Morgan. During the Earp Vendetta Ride, the federal posse looked for Pete Spence but found he was already in jail. They killed Florentino "Indian Charlie" Cruz, who had been identified by Pete Spence's wife as taking part in ambushing Virgil. They also accidentally came upon Curly Bill Brocius at a spring and Wyatt killed him with a single shotgun blast. Wyatt shot Johnny Barnes in the same gunfight and he died soon after.