District Attorney Harvey Dent was one of Batman's strongest allies in Gotham City until Carmine Falcone threw acid in Dent's face and hideously scarred him. The wounds fractured Dent's psyche and he was reborn as Two-Face: a schizoid criminal mastermind obsessed with duality. His former good-luck charm, a "two-headed" trick silver dollar, was damaged on one side from the attack and Dent had seized on it as a reflection of his half-scarred visage. Two-Face flipped the coin to decide the fates of his victims. Despite Batman's efforts to reform his former ally, Dent was consumed by his fixation on chance, and his crimes were designed to prove out his diametric philosophy. His crimes usually revolved around the number two; for example, he would rob the Second National Bank on February 22nd.