Gravano was the underboss for the Gamino crime family, the biggest and most powerful Italian mafia organization in the USA. Gravano was best friends and official underboss to John Gotti. Gravano was involved in 19 murders and he was a body builder who had the nickname ‘the bull’. Gravano was feared across the entire East Coast. He was aggressive and got things done. His reputation proceeded him and his relationship with Gotti was like brothers, until the fell out and Gravano later testified against his former boss and best friend.