J. Carroll Corcoran was a Gotham City councilman.
Hoping to earn votes in his reelection bid, Councilman Corcoran endorsed the new vigilante "The Judge". Corcoran presented himself as a decent, law & order leader to boost popularity. Some considered him to have an unorthodox method of crime fighting by approving of the Judge, to which Corcoran just retorted that Commissioner Gordon approved of Batman's vigilantism. But he even went further: Corcoran illegally provided the Judge with police files and other information of some of Batman's high-profile rogues. Corcoran only cared about polls, reducing crime or doing his duty to protect the lives and property of Gotham's citizens. With more rogues being dealt with by the Judge, the more Corcoran's popularity grew.
Batman went to him to find the Judge, but Corcoran would not budge. The Judge did everything the people of Gotham wanted: hitting the big criminals hard. Corcoran also defended his view by pointing out the poor security at Arkham Asylum that kept letting the criminals escape.
Two-Face especially didn't like the prospect of being hunted when Corcoran had hinted that he'd be next on the Judge's list. So instead, he and Manny kidnapped him in the City Hall's parking lot. At the court house, Two-Face grilled Corcoran for information, but would not budge. With no use left for Corcoran, Two-Face ordered Manny and Mo to kill him. Corcoran tried to bargain his way out with $100,000 he had as a slush fund, but Two-Face declined. Corcoran tried the same trick on Manny and Mo, but they refused too. As they were about to shoot him, the Judge showed up.Corcoran hoped to be rescued, but he was wrong. After Manny and Mo were taken out, the Judge confronted the councilman with his crooked nature. Managing a slush fund constitutes theft, and the Judge prepared to "try" Corcoran, also remarking how he has betrayed the trust of Gotham's citizens by "stealing from the people you swore to protect". As the Judge was about to strike, Batman arrived. In the fight, Batman was "arrested" when the Judge restrained his arms with electronic handcuffs, and a wild swash of the Judge's sword cut loose Corcoran's bonds. When the Judge was defeated, Corcoran pleaded for Batman's help. The whole affair would be bad for his reelection, especially if news of his slush fund came out. Batman casually remarked "You have no idea" as he unmasked the Judge and revealed him to be Two-Face. At that moment, police and press arrived on the scene, and the photograph of him holding the Judge's mask became front-page news. Bruce Wayne was later seen with an issue of the newspaper, along with the headline that Corcoran lost the primary. News of Corcoran's (indirect) support of Two-Face, as well as taking kickbacks caused him to lose his reelection bid.