Gilgo Beach Killer Update | Rex Heuermann, Is The Prime Suspect In The Killings Of Three Other WomenA married father accused by authorities of leading a double life, Heuermann had faced three counts of first-degree murder for the killings of Melissa Barthelemy in 2009, and Megan Waterman and Amber Costello the following year, according to the Suffolk County district attorney. He has pleaded not guilty and is being held without bail.