The suspected Gilgo Beach serial killer previously blamed for the deaths of six women on New York’s Long Island was charged Tuesday with the murder of a seventh alleged victim.

Valerie Mack, 24, is the latest murder victim linked to Rex Heuermann.

Mack, of New Jersey, was known as Jane Doe No. 6 for two decades. Her torso was discovered in a wooded area in Manorville in November 2000 – and the remaining remains were found near Gilgo Beach 11 years later – before her identification went through DNA in 2020.

Mack’s remains found on Gilgo Beach were among those of other women who authorities believe were also allegedly attacked by Heuermann, 61. He has been arrested since July 2023 and is awaiting trial.

Heuermann had pleaded not guilty to the earlier charges when he appeared Tuesday on charges related to Mack’s death.

“I am not guilty of any of these charges,” he said.

A tentative trial date is expected to be set on Tuesday.

According to court documents, female hair found on Mack’s remains was linked to Heuermann’s wife and daughter through DNA testing.

Prosecutors said mitochondrial DNA testing on scalp hair found near Mack’s left wrist ruled out 99.65% of the North American population. Not excluded: Heuermann’s daughter, who was between three and four years old at the time of Mack’s murder – and his wife Asa Ellerup.

Prosecutors said Mack’s breasts were mutilated and her remains bound with rope, similar to pornographic images on Heuermann’s electronic devices from the time she was killed.

Prosecutors also said an alleged planning document found on his equipment listed “foam drain cleaner” among the supplies prosecutors believe he sought to cover up his alleged murders.

Investigators also said they recovered a collection of physical copies of magazine and newspaper articles about the murder, including copies of Newsday, the New York Post, People and New York Magazine, which Heuermann kept at his Long Island home.

According to the public prosecutor’s office, six of the seven alleged Heuermann victims are linked to the defendant or his family through DNA evidence.

Prosecutors said that — in addition to the dismemberment — “two continuous ragged defects” were found on Mack’s chest after her death. Prosecutors suspect the alleged serial killer also removed a tattoo of Mack’s son’s name from her left ankle.

Heuermann became a suspect in Mack’s killing in June when prosecutors revealed a document they discovered that mentioned Manorville – near gun clubs where Heuermann was a member – as a potential “landfill.”

Mack was last seen by the family in October 2000. Like the six other victims – Megan Waterman, Melissa Barthelemy, Amber Costello, Maureen Brainard-Barnes, Jessica Taylor and Sandra Costilla – she had been a sex worker.

The remains of four of the women were discovered intact on Gilgo Beach on southern Long Island. But two more were separated – with some body parts in Gilgo Beach, Manorville and North Sea. Investigators have long assumed that the deaths were related.

Heuermann, a New York architect, was initially charged with the murders of Waterman, Barthelemy and Costello, who were murdered between 2009 and 2010. He was later charged with the murders of Taylor in 2003 and Costilla in 1993.

Prosecutors have also named Heuermann as a suspect in the death of Karen Vergata, whose remains were found in separate locations in 2011 and 1996, although he has not been charged in her death.