Doctor Fang was a former boxer and actor who turned to crime and emerged in Gotham City's underworld as a numbers racketeer and criminal mastermind. He tried to bribe local cop, Harvey Bullock, believing him to be dishonest, but Bullock quickly alerted Bruce Wayne, and so Batman and Robin were able to put a stop to Fang's scheme. After several more run-ins with Batman, Fang was accidentally killed by the Night-Slayer .