Gilgo Beach Suspect Rex Heuermann Charged with Seventh Murder

Rex Heuermann, a New York architect accused in connection with a series of killings on Long Island’s Gilgo Beach, has now been charged with the death of a seventh victim. On Tuesday, the 61-year-old was formally accused of killing Valerie Mack. Ms. Mack, who had been employed as an escort in Philadelphia, was last observed by her family in New Jersey in the year 2000. According to prosecutors, Ms. Mack’s identity was confirmed via DNA evidence. Mr. Heuermann was linked to her death in June due to a device discovered in his Long Island residence, which allegedly contained comprehensive notes concerning serial killings. He made a court appearance on Tuesday and entered a plea of not guilty to the murder charges. Mr. Heuermann has remained in custody without bail since his apprehension in July 2023, which occurred outside his architecture office in Manhattan. His initial charges included the murders of three women: Melissa Barthelemy, aged 24; Megan Waterman, aged 22; and Amber Costello, aged 27. Subsequently, he was charged with the murders of Maureen Brainard-Barnes, 25; Jessica Taylor, 20; and Sandra Costilla, 28. At the time of their deaths, these women were thought to have been employed as sex workers. Law enforcement has been investigating a series of at least 10 deaths on Long Island’s Gilgo Beach since 2010. The discovered remains comprise 10 adults and one toddler, with the homicides dating back to at least 1993. During a news conference held on Tuesday, Suffolk County District Attorney Raymond Tierney appeared alongside family members of the victims. He stated that these families had “steadfastly stood by their loved ones and jealously guarded their memories.” Mr. Tierney added, “We have nothing but respect and admiration for those victims’ families.” Mr. Tierney indicated that further suspected murders remain under active investigation. “We are not limiting this investigation to Gilgo Beach,” Mr. Tierney informed reporters, adding, “We will continue to work these cases.” Prosecutors stated that DNA recovered from Ms. Mack’s remains corresponded to that of Heuermann’s family members. While his family members are not believed to have participated in the alleged offenses, the evidence suggests the potential that the killings occurred within the family’s residence. Mr. Tierney cited evidence of “careful and meticulous planning,” noting that the road close to where Ms. Mack’s remains were discovered was marked as “DS” in a document, which investigators interpret as “dump site.” Previously, prosecutors confiscated hundreds of electronic devices and 300 firearms from the home, asserting that they located DNA evidence and a comprehensive “blueprint” of the crimes on Heuermann’s computer. One document contained specific labels categorizing elements like “problems,” “supplies,” “pre-prep,” “prep,” and “post-event,” alongside mentions of “DNA,” “tire marks,” and “blood stains.” Furthermore, the document underscored insights gained from previous murders and various killing methods that Mr. Heuermann had investigated.