Before his transformation into Two-Face, Harvey Dent has a successful career as Gotham's district attorney, and is driven to bring an end to the city's epidemic of organized crime. Following his disfigurement, he becomes obsessed with the number two and the concept of duality, and thus stages crimes centered around the number two—such as robbing buildings with 2 in the address or staging events that will take place at 10:22 p.m. (2222 in military time).