Accused Gilgo killer indicted in another murder, bringing victim count to 7: DA

The New York City architect arrested last year in connection with a string of cold case bodies found on Long Island's Gilgo Beach has been charged with another woman's murder, bringing the body count against him thus far to seven, according to a superseding indictment unsealed Tuesday.

Rex Heuermann is accused of murdering Valerie Mack, an escort who vanished in 2000 and in whose death he had been considered a suspect, the district attorney said. Prosecutors say DNA evidence secured the forensic link, that analysis of a hair found with Mack’s remains, has been linked to Heuermann’s wife and daughter.

Heuermann pleaded not guilty to the new charge Tuesday. He has pleaded not guilty to the other murder charges against him as well. A judge remanded him without bail after the hearing.

Mack, 24, had been working as an escort in Philadelphia and was last seen by her family in New Jersey the year she disappeared. According to prosecutors, Heuermann’s so-called “planning document,” recovered from a personal computer during a search over the summer, references the dumping site where parts of Mack's body were found.

That document was created in 2000, the year Mack went missing and was killed, according to prosecutors' bail application. They also allege Heuermann mutilated Mack's right leg, the same leg that bore a tattoo with her son's name, to thwart efforts to identify her.

Read the superseding indictment

---

In addition, prosecutors say their searches of Heuermann’s home yielded varied magazine and news accounts of the Long Island serial killer, allegedly serving as “souvenirs or mementos” of his alleged crimes

Authorities have also been looking into the death of Karen Vergata, whose remains were first discovered in 1996 and finally identified in 2022 after a new DNA analysis. There was no immediate update Tuesday on her case.

Heuermann, 61, was first arrested in July 2023 in the deaths of three of the so-called "Gilgo Four," whose remains were found in burlap sacks along a remote stretch of Ocean Parkway in 2010. He was later charged with the fourth.

The bodies of Maureen Brainard-Barnes Amber Lynn Costello, Melissa Barthelemy and Megan Waterman were discovered during a search for a missing escort, Shannan Gilbert, who later was found dead in a marsh. Her case was ruled an accidental drowning, though attorneys for her family maintained the autopsy was inconclusive.

Read the bail application

---

Investigators say Gilbert's case is not tied to the others. Additional sets of remains turned up in that search for Gilbert, too. Authorities are still trying to identify some of them, including remains belonging to an "Asian Doe."

In June, authorities charged Heuermann with two additional murders, those of Jessica Taylor, whose hands and forearm were found along Ocean Parkway years after her torso turned up in the Manorville woods; and Sandra Costilla, who allegedly died a violent death by his hands in November 1993.

Heuermann has pleaded not guilty to the charges. His attorney, Michael Brown, had no immediate comment on the new allegations Tuesday.

Heuermann has been held without bail since his initial arrest. If convicted, he faces multiple sentences of life without parole.

gilgonews.com