Prosecutors have charged Rex Heuermann, the alleged Gilgo Beach serial killer, with a 7th murder — 24-year-old Valerie Mack of New Jersey.
Mack’s partial remains were discovered in Manorville in 2000 and near Gilgo Beach a decade later. She was identified in 2000 through DNA analysis.
Prosecutors linked Heuermann to Mack through DNA testing, according to court documents. The female hair on Mack’s remains is a 99.65% match to that of Heuermann’s wife and daughter.
“As I’ve previously stated, the work of the Gilgo Task Force is ongoing and continuing,” District Attorney Ray Tierney said at a news conference this morning announcing the new charge. “I meant what I said: the defendant is now charged with the murder of seven young women.”
Heuermann has pleaded not guilty.
The Massapequa Park architect was arrested in July 2023 for the deaths of three women whose remains were found along Gilgo Beach. Since then, he’s racked up charges in four more cold cases, including a woman who was allegedly murdered in 1993.
When pressed on when the cases would go to trial, Tierney reiterated that the investigation must continue.
“The business of Suffolk County law enforcement cannot stop with this case,” Tierney said. “So there’s always that tension. We’ve got to provide this case for trial. This judge will not take any excuses, so we’ve got to do that. But we’ve got an obligation to continue investigating these cases to provide closure to as many families as we can.”
