Gilgo Beach: Police identify another victim in serial killing investigation, sources say

Authorities have identified another victim in the Gilgo Beach, New York, murders investigation, sources familiar with the case told ABC News, though it is not clear if this new victim is linked to suspect Rex Heuermann.

Suffolk County officials are expected to identify Jane Doe No. 7, whose remains were found on Fire Island in 1996, at a Friday morning news conference, the sources said. Her remains have been linked by DNA to other human remains found along Ocean Parkway near Gilgo Beach in 2011, sources said.

Suffolk County District Attorney Ray Tierney told Newsday that authorities believe they will soon be able to identify the remains of three more unidentified victims in the larger Gilgo Beach investigation.

Tierney said the identifications would be made by the FBI using genetic genealogy, "among other things." The FBI used genetic genealogy in 2020 to positively identify Valerie Mack, another of the 10 victims tied to Gilgo Beach.

"We’re honing in on that, and I think we’ll have information on that -- on some of the identifications shortly," Tierney said.

Those victims -- a man as well as a woman and a toddler who were found together -- have remained unidentified.

Heuermann, a New York City architect and father of two from Massapequa Park, Long Island, was arrested on July 13 for the murders of three of the Gilgo Beach victims: sex workers Megan Barthelemy, Megan Waterman and Amber Costello. The young women disappeared in 2009 and 2010 and their bodies were found on Long Island in 2010.

Heuermann's attorney entered a not guilty plea on his behalf.

Heuermann is also the prime suspect in the death of a fourth victim, Maureen Brainard-Barnes, who vanished in 2007. Though he has not been charged in that case, according to sources, the investigation is "expected to be resolved soon."

Tierney told Newsday that a distinctive belt with the initials "WH" or "HM" was used to bound Brainard-Barnes' remains. WH are the initials of Heuermann's father.

Meanwhile, Suffolk County prosecutors are asking a judge to order Heuermann to submit a DNA sample as they work to determine whether he is connected to other Gilgo Beach killings or other murders across the country. The mitochondrial DNA and the discarded pizza box sample used to tie him to the three murders he's charged with are ineligible to be submitted to databases circulated to law enforcement agencies nationally and statewide.