A1274815#14
"His campaign against crime ends tragically during the prosecution of crime boss Sal "Boss" Maroni for murder. ...
The comic book limited series Batman: The Long Halloween elaborates on these events, with some changes. In it, Dent, Captain (later Commissioner) James Gordon, and Batman forge an alliance to rid Gotham of crime. Mafia chieftain Sal "The Boss" Maroni is still the criminal who disfigures Dent with help from the corrupt Assistant District Attorney Vernon Field, who provides him with the acid (concealed in an antacid bottle). Dent gets his trademark coin from his abusive father, who is referred to as being in some form of mental institution (his relationship with his father was earlier introduced in Batman Annual #14).[5] Gilda Dent, who had been Dent's fiancée back in Detective Comics #66 and 68 (1942),[2][6] is instead his wife in The Long Halloween (1998). Dent escapes from the hospital and hides out in the sewers for weeks, finally resurfacing as Two-Face to take revenge on the mob, killing Vernon Field and mob boss Carmine Falcone (Maroni has already been assassinated by this point by Falcone's son Alberto). By the end, Two-Face is incarcerated in Arkham Asylum."