Anthony Casso

https://en.wikipedia.org/wiki/Anthony_Casso

Anthony Salvatore Casso (born May 21, 1942), nicknamed Gaspipe, is an American mobster and former underboss of the Lucchese crime family. During his career in organized crime, Casso was regarded as a "homicidal maniac" in the Italian-American Mafia as he admitted to the government responsibility for 36 murders but most likely committed many more.[1] Former Lucchese captain and government witness Anthony Accetturo once said of Casso, "all he wanted to do is kill, kill, get what you can, even if you didn't earn it."[2] In interviews and on the witness stand, Casso has confessed involvement in the murders of Frank DeCicco, Roy DeMeo, and Vladimir Reznikov. Casso has also admitted to several attempts to murder Gambino family boss John Gotti.

Following his arrest in 1993, Casso became one of the highest-ranking members of the Mafia to turn informer. In 1998, however, the US government rescinded Casso's plea agreement and dropped him from the witness protection program. Later that year, a federal judge sentenced him to 455 years in prison.