|Real name:||Arnold John Flass|
|First Appearance:||Batman #404|
|Created by:||Frank Miller|
|Portrayed by:||Mark Boone Junior|
1987's Batman: Year One introduced Flass as a cheerful and chummy jock with a dark side. Burly, blond, and clean shaven, Flass was Jim Gordon's partner on the G.C.P.D. and Gordon's first introduction to Gotham's seediness. Indicative of much of the Gotham City police force of the time, Flass was extremely corrupt, often on the take for powerful politicians and crime figures. He was resentful of the strong moral character of Gordon (whom he condescendingly referred to as "Jimmy") and attempted to teach him a lesson. Flass and several other officers accost Gordon and beat him mercilessly. Gordon soon turned the tables on Flass, beating and humiliating him, thus beginning his crusade against the corrupt element in the police force.
Batman later captured Flass and turned him over to Gordon, who charged him for affiliation with the underworld. Then-Assistant District Attorney Harvey Dent offered Flass a plea bargain he couldn't refuse: in exchange for testimony against Carmine "The Roman" Falcone and then-Police Commissioner Gillian Loeb, Flass would receive a lighter sentence. Flass accepted the offer, and since he was intelligent enough to record extensive notes of his dealings with the Mob, Dent had ample evidence to prosecute much of Gotham's organized crime.
After Year One, Flass made only occasional cameos in the Batman series. He was the third victim of the Hangman killer during the limited series Batman: Dark Victory. Gordon found him working as a bouncer at a sleazy strip club called the "Cheetah Room," and he was killed there while on his smoke break. Judging from the abrasions on his body, it appeared he tried to put up a fight.