As tensions rise, Wyatt is pressured to help rid the town of the Cowboys, though he is no longer a lawman. Curly Bill begins shooting at the sky after a visit to an opium den and is told by Marshal Fred White to relinquish his firearms. Curly Bill instead shoots the marshal dead, and is forcibly taken into custody by Wyatt. The arrest infuriates Ike Clanton and the other Cowboys. Curly Bill stands trial, but is found not guilty due to a lack of witnesses. Virgil, unable to tolerate lawlessness, becomes the new marshal and imposes a weapons ban within the city limits. This leads to a gunfight at the O.K. Corral, in which Billy Clanton and the McLaury brothers are killed. Virgil and Morgan are wounded, and the allegiance of county sheriff Johnny Behan with the Cowboys is made clear. As retribution for the Cowboy deaths, Wyatt's brothers are ambushed; Morgan is killed, while Virgil is left handicapped. A despondent Wyatt and his family leave Tombstone and board a train, with Ike Clanton and Frank Stilwell close behind, preparing to ambush them. Wyatt sees that his family leaves safely, and then surprises the assassins. He kills Stilwell, but lets Clanton live to send a message: Wyatt announces that he is a U.S. marshal, and that he intends to kill any man he sees wearing a red sash. Wyatt, Doc, a reformed Cowboy named Sherman McMasters, Texas Jack Vermillion, and Turkey Creek Jack Johnson, form a posse to seek revenge.