Suspected serial killer Rex Heuermann is facing more charges.
The 60-year-old has been charged with the murders of two more women, bringing the total number of his alleged victims to six. At a June 6 court hearing, the New York architect's attorney entered a not-guilty plea on his behalf to charges of second-degree murder in the deaths of Jessica Taylor, 20, and Sandra Costilla, 28, NBC News reported.
E! News has reached out to Heuerman's lawyer for comment and has not heard back.
According to an indictment obtained by NBC News, forensic analyses linked Heuermann's DNA to that of hairs found on the bodies of Taylor and Costilla, which were found decades ago.
A witness walking their dog discovered part of Taylor's remains—she was decapitated, with her arms severed and a torso tattoo mutilated—in Manorville on Long Island, N.Y. in 2003. Eight years later, in 2011, her skull, hands, and forearm were discovered about 45 miles away along a highway by Gilgo Beach, not far from the bodies of four of Heuermann's alleged murder victims Melissa Barthelemy, 24, Megan Waterman, 22, Amber Lynn Costello, 27, and Maureen Brainard-Barnes, 25, were found in 2010.
Like them, Taylor was believed to be a sex worker. Her mother reported her missing in July 2003 and a witness told investigators that around the same time, they saw a "dark-colored Chevrolet pickup truck" near where her body was found. Heuermann had bought a 2002 dark-colored Chevrolet Avalanche the previous March, the indictment stated. A forensic analysis of his digital devices showed that days after her murder, he read a news article about the discovery of her body and also searched to buy a new Chevrolet Avalanche, it said.
As for Costilla, a pair of hunters found her remains in the woods in the Long Island town of North Sea in 1993. "Sharp force injuries" were seen on multiple parts of her body, the indictment said. Also located: three hairs that could be linked to Heuermann, the document stated, adding that while "99.96 percent of the North American population can be excluded as the contributor of the Male Hair on Costilla, Defendant Heuermann cannot be excluded."
The indictment also said investigators seized from Heuermann several electronic devices, including a laptop containing a document, created in 2000 and edited multiple times in 2002, that listed four headings.
"Based on the Gilgo Homicide Task Force's training and experience, the members believe 'PROBLEMS' to be a guide on issues to avoid apprehension, 'SUPPLIES' to be a reference to what supplies are needed to carry out the serial murders, to avoid apprehension, and to avoid leaving behind DNA evidence," the document states, adding that "The 'DS' heading appears to be an acronym for 'dump site'" and "TRG" "appears to be a reference to target or victim."
Heuermann was arrested in July 2023 and charged with the first and second-degree murders of Barthelemy, Waterman and Costello. In January, he was charged for the second-degree murder of Brainard-Barnes. He had pleaded not guilty to all four killings. As with Taylor and Costilla, DNA analysis of stray hairs found on the remains of Waterman, Costello and Brainard-Barnes had helped link Heuermann to their murders, the indictment said.
The remains of the "Gilgo Four" were found on Gilgo Beach in December 2010. Heuermann's original indictment described them as "petite females approximately 22 to 27 years old, believed to be working as sex workers." The document added, "All had missing clothing and personal possessions, all had been killed by homicide, all had contact shortly before their disappearances with a person using a 'burner' cellphone."
The original indictment also stated that Heuermann's phone billing records showed he used his own device in the same general locations as burner phones used to contact Barthelemy, Waterman, and Costello, and where calls were made from Brainard-Barnes' cellphone to check her voicemail days after her disappearance.
At the time of his arrest, Heuermann was carrying a burner cellphone linked to an email account he allegedly used to conduct online searches related to sex workers, as well as "sadistic, torture-related pornography and child pornography," the document added.
Heuermann, who was ordered to remain behind bars without bail, has a hearing scheduled for July 30, NBC News reported. He faces multiple sentences of life without parole if convicted.
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