John Gotti was a gangster and boss of the Gambino crime family, an organized crime syndicate based in New York City. With help from Gotti's underboss, Salvatore Gravano, Gotti was convicted in 1992: he was found guilty on 13 counts, including murder and racketeering. Gotti was given a life sentence but died in 2002 from head and neck cancer.History.com: John Gotti

Gotti was often referred to as "The Teflon Don" because prosecutors couldn't convict him of any charges in the 1980s. After his 1992 conviction, a New York official commented, "The Don is covered with Velcro, and every charge stuck."FBI: John Gotti