John Gotti - The Teflon Don, took out Paul Castellano and was taken down by Sammy the Bull Gravano

John Joseph Gotti Jr. (October 27, 1940 – June 10, 2002) was an American gangster and boss of the Gambino crime family in New York City. He ordered and helped to orchestrate the murder of Gambino boss Paul Castellano in December 1985 and took over the family shortly thereafter, becoming boss of what was described as America's most powerful crime syndicate. Gotti and his brothers grew up in poverty and turned to a life of crime at an early age. Gotti quickly became one of the crime family's biggest earners and a protégé of Aniello Dellacroce, the Gambino family underboss, operating out of the neighborhood of Ozone Park in Queens. Following the FBI's indictment of members of Gotti's crew for selling narcotics, Gotti began to fear that he and his brother would be killed by Castellano for dealing drugs. As this fear continued to grow, and amidst growing dissent over the leadership of the crime family, Gotti organized the murder of Castellano. At his peak, Gotti was one of the most powerful and dangerous crime bosses in the United States. During his era, he became widely known for his outspoken personality and flamboyant style, which gained him favor with some of the general public. While his peers generally avoided attracting attention, especially from the media, Gotti became known as "The Dapper Don", for his expensive clothes and personality in front of news cameras. He was later given the nickname "The Teflon Don" after three high-profile trials in the 1980s resulted in his acquittal, though it was later revealed that the trials had been tainted by jury tampering, juror misconduct and witness intimidation. Law enforcement authorities continued gathering evidence against Gotti, who reportedly earned between $5–20 million per year as Gambino boss. Gotti's underboss, Salvatore "Sammy the Bull" Gravano, aided the FBI in convicting Gotti; in 1991, Gravano agreed to turn state's evidence and testify against Gotti after hearing the boss make disparaging remarks about him on a wiretap that implicated them both in several murders. In 1992, Gotti was convicted of five murders, conspiracy to commit murder, racketeering, obstruction of justice, tax evasion, illegal gambling, extortion, and loansharking. He received life in prison without parole and was transferred to United States Penitentiary, Marion. Gotti died of throat cancer on June 10, 2002, at the United States Medical Center for Federal Prisoners in Springfield, Missouri. According to Anthony "Gaspipe" Casso, the former boss of the Lucchese crime family, "what John Gotti did was the beginning of the end of Cosa Nostra".