The film starts In 1973 in New York, and ends in 1992, with Gotti's imprisonment. Gotti's association with three mobsters is also highlighted in the film: a father-son like relationship with family underboss Aniello "Mr. Neil" Dellacroce, his deep but rocky friendship with Gotti crew member and longtime friend Angelo Ruggiero, and the respect and ultimate frustration that he felt for the man who became his underboss, Salvatore "Sammy the Bull" Gravano. The film details Gotti's rise within the Gambino crime family and his ranks from soldier, then captain (or capo), and finally, boss. The final title was achieved through the dramatic murder in public of Gambino family boss Paul Castellano in 1985. Following the murder of Castellano, the film concentrates on the legal trials of John Gotti: one for assault and two for racketeering under the Racketeer Influenced and Corrupt Organizations (RICO) statutes. Gotti's famous personality, trial acquittals, and media attention are all dramatized. The film ends with Gotti's conviction and sentencing to life imprisonment at Marion Federal Penitentiary in Marion, Illinois, because Gravano turns state's evidence and agrees to testify against Gotti. The film is primarily based on the columns of reporter Jerry Capeci, who also wrote the novel that documented Gotti's rise and fall inside the Gambino crime family, and served as executive producer of the film which was based on his novel.