Bones Found in Purported Mob Graveyard NEW YORK - Investigators found the remains of two people believed to be former Mafia captains at a vacant lot apparently used for years as a graveyard for people ordered killed by the late mob boss John Gotti and other gangsters, authorities said.    Searchers recovered bones and other tissue in a shoe, ribs, a partial jaw and teeth and two personal items that led investigators to believe they had the remains of Bonanno crime family captains Philip Giaccone and Dominick Trinchera, law enforcement officials familiar with the dig said Tuesday on condition of anonymity...