Police have confirmed the identity of one of the four bodies found on a Long Island beach last December as being 22-year-old Megan Waterman of Maine. Waterman disappeared in Suffolk County last June after coming to Long Island to meet a john she met on Craigslist. The identities of the other three bodies has yet to be determined, but medical evidence has helped police rule out Shannon Gilbert, a Jersey City prostitute who many initially speculated was one of the four. No cause of death has been released yet.