 Amuso's reign is considered one of the bloodiest periods in American Mafia history during the late 1980s and early 1990s, alongside his former underboss and close protégé Anthony Casso, who turned informer against him in 1994.Since the death of Colombo crime family boss Carmine Persico in March 2019, Amuso is currently the longest-serving crime family boss of the Five Families and American Mafia, dating back to 1987.Amuso has been serving a life sentence since 1992 and is currently allocated at the Federal Correctional Institution, Cumberland, in Maryland, on murder and racketeering charges.