On this day in 1992 would be a day that the book was thrown at John Gotti. After calling an eyewitness of the Sparks hit who identified Gotti associate John Carneglia as one of the men who shot Bilotti, they then brought Sammy Gravano in to testify.

Less than a month later Gotti was given life imprisonment without parole.

On March 2, 1992, the walls finally closed in on John Gotti inside a Brooklyn federal courtroom, as the government unleashed its most devastating weapon — a man who had stood at Gotti's side through years of bloodshed, conspiracy, and murder. That weapon was Salvatore "Sammy the Bull" Gravano, underboss of the Gambino crime family, and his testimony would prove to be one of the most consequential moments in the entire history of American organised crime.

The trial had already been building momentum against the so-called Dapper Don. Prosecutors had called an eyewitness to the 1985 Sparks Steak House murders, who placed Gambino associate John Carneglia among the gunmen who cut down Paul Castellano's driver, Thomas Bilotti, in the chaos of that frigid December evening on East 46th Street. But it was Gravano who delivered the killing blow. Having agreed to cooperate with federal authorities in exchange for a reduced sentence, Gravano took the stand and provided the jury with an insider's account of Gambino family operations that no outsider could ever have offered. He confirmed Gotti's direct involvement in the Castellano hit and laid bare the inner workings of a criminal empire that had made the Gambinos the most feared of New York's Five Families.

The significance of Gravano's betrayal cannot be overstated. Since the days of Lucky Luciano and the establishment of the National Crime Syndicate in the 1930s, the code of omertà — the sacred law of silence — had served as the bedrock upon which organised crime was built. When Gravano broke that code, he didn't merely betray one man; he shattered a mythology that the mob had spent decades cultivating. His testimony ran to hundreds of pages and touched on over a dozen murders, racketeering, and obstruction of justice, dismantling the carefully constructed image of Gotti as an untouchable boss.

Less than a month after Gravano took the stand, John Gotti was convicted on all counts and sentenced to life imprisonment without the possibility of parole. He would die behind bars at the United States Medical Centre for Federal Prisoners in Missouri in June 2002, never having tasted freedom again.

The Gotti trial marked the beginning of the end for the old-guard American Mafia, proving that no boss, however powerful or media savvy, was beyond the reach of the law when a trusted insider was willing to talk.