In Liberty City Stories it is revealed that he is a cannibal and a necrophiliac, and that he eats Avery's body on his private jet while fleeing Liberty City.
He eats Avery's body on his private jet while. This was what it is revealed in Liberty City Stories. He is fleeing Liberty City. This was what it is revealed in Liberty City Stories. He is a cannibal and a necrophiliac. He is that.