Jon Gravelli

Jon Gravelli (1923 - 2008) was an old school and well connected Mafia boss who took charge of the Gambetti Family in 1978 after the death of Sonny Cangelosi. The Gambetti Family became one of the most powerful of Liberty City's Mafia families under Gambetti's leadership.

He had a son, Jon Gravelli, Jr., who was a former associate of the Gambetti's but was disowned after he developed a cocaine addiction.

Since 2005, he was a patient in Schottler Medical Center. He was charged with racketeering in 2006 and was awaiting trial.

In 2008, Gravelli was introduced to Niko Bellic via cellphone through his contact at U.L. Paper who is referred to as a "mutual friend". It was through his and U.L Paper's assistance that Niko is able to have Darko Brevic delivered to him.

After Niko has taken his revenge on Dimitri Rascalov or Jimmy Pegorino, Gravelli passes away peacefully in his sleep, prior to standing trial.