Jude betrayed Amanda, and Lex helped her discover him at Club Zero in the company of other women. He blamed Lex for her leaving him, but Lex's responds "You brought this on yourself."
While still at the club, Jude stabbed Lex in the shoulder with a knife. Lex's personal security guard, Max Kasich, tried to intervene, but his gun was knocked from his hand. Amanda picked up the gun and shot Jude dead on the dance floor.