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Rex Heuermann, the suspect in the Gilgo Beach serial killings, has been charged with the murder of a seventh woman, Valerie Mack. The charge was announced on Tuesday (December 17) after a superseding indictment was unsealed. Mack's remains were first discovered in a wooded area of Manorville, Long Island, in November 2000, and additional remains were found in April 2011 near Gilgo Beach.
Prosecutors linked Heuermann to Mack's death through mitochondrial DNA analysis of a female hair found on Mack's body, which matched the profiles of Heuermann's wife and daughter. At the time of Mack’s murder, Heuermann's daughter was between three and four years old. Additionally, evidence from 350 electronic devices seized from Heuermann revealed a collection of violent pornography, including images of mutilation and bondage, which prosecutors say are consistent with the injuries inflicted on Mack.
Investigators also found a document they believe Heuermann used to plan his kills. Created in 2000, the document listed supplies like "rope/cord" and "saw/cutting tools," and included a section labeled "DS" for "dump site," naming a location where Mack's remains were found. It also had a "body prep" section with instructions to "remove head and hands."
Heuermann, 61, was charged with one count of second-degree murder in Mack's death. During his court appearance on Tuesday, he pleaded not guilty and remains held without bail. The defense has until next month to file motions related to evidence and may challenge the DNA methods used by prosecutors. Heuermann was initially arrested in July 2023 and has pleaded not guilty to the murders of six other women.