Rex Heuermann pleaded guilty crimes crimes known as the Gilgo Beach killings. He pleaded guilty.to three counts of first-degree murder and four of intentional murder. Although he wasn’t charged in her death, he also admitted that he killed Karen Vergata in 1996. Heuermann admitted that he strangled all eight victims and dismembered some of them before dumping their bodies. The remains of six victims - those of Melissa Barthelemy, Brainard-Barnes, Amber Lynn Costello, Valerie Mack, Taylor and Megan Waterman - were found in the scrub along Ocean Parkway near Gilgo Beach. The remains of another, Sandra Costilla, were found more than 60 miles away in the Hamptons. Police also identified the remains of Vergata, which were found on Fire Island, more than 20 miles away in 1996, and near Gilgo Beach in 2011. On his computer, investigators said, they found what they described as a 'blueprint' for the killings, including a series of checklists with reminders to limit noise, clean the bodies and destroy evidence.