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Concealed Republican > Blog > Politics > Suffolk County Judge Clears Advanced DNA Testing in the Gilgo Beach Murder Case
Politics

Suffolk County Judge Clears Advanced DNA Testing in the Gilgo Beach Murder Case

Jim Taft
Last updated: September 24, 2025 5:32 am
By Jim Taft 4 Min Read
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Suffolk County Judge Clears Advanced DNA Testing in the Gilgo Beach Murder Case
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A Suffolk County judge ruled Tuesday that prosecutors may use advanced DNA testing in the case against accused Gilgo Beach serial killer Rex Heuermann, delivering what officials called a major victory for the prosecution, as reported by The New York Post.

Judge Tim Mazzei’s decision clears the way for Suffolk County District Attorney Ray Tierney to pursue a single trial for all seven murder charges tied to the Long Island case.

⚖️ Motion by suspected Gilgo Beach serial killer to separate cases into multiple trials denied https://t.co/FC1a0AuCEn
@sophiabhall1 reports: pic.twitter.com/n3gwZZwkPs

— 1010 WINS on 92.3 FM (@1010WINS) September 23, 2025

Prosecutors say the ruling could prove decisive, as the evidence directly links Heuermann to multiple victims whose remains were discovered along Ocean Parkway.

“If I wasn’t confident in this case, I would’ve never brought it to trial,” Tierney told reporters following the ruling.

Heuermann, a 61-year-old architect from Massapequa Park, was arrested in July 2023 after a long-running investigation that was revived under former NYPD official Rodney Harrison, who became Suffolk County police commissioner and reopened the cold case.

This Could Be the Most Important Video Gun Owners Watch All Year

The bodies of the seven women were discovered between 1993 and 2010 along a desolate stretch of Gilgo Beach.

The victims named in the indictment are Valerie Mack, 24, Melissa Taylor, 20, Megan Waterman, 22, Melissa Barthelemy, 24, Maureen Brainard-Barnes, 25, Sandra Costilla, 28, and Amber Lynn Costello, 27.

Big decision ahead in the Gilgo Beach case: Today, a Suffolk judge will rule if the Long Island Serial killer suspect Rex Heuermann will face ONE trial for all 7 alleged murders — or separate trials, as his defense is pushing for. pic.twitter.com/jdmoMC2ec4

— Laura Ingle (@lauraingle) September 23, 2025

Defense attorney Michael Brown challenged the DNA evidence, calling it “magic,” and argued that his client should face separate trials for each murder.

Brown also claimed that Astrea Labs, which processed the degraded DNA samples using advanced methods, is not licensed in New York and therefore could not legally provide the testing.

Judge Mazzei rejected those arguments, ruling that the high-tech DNA analysis could be admitted. The decision marks the first time in New York state that such degraded DNA evidence has been cleared for use in a criminal trial.

Heuermann has pleaded not guilty to the charges and remains held without bail as the case proceeds toward trial.

Prosecutors said they expect to call “well over” 100 witnesses from 15 different states and have entered more than 6.5 million documents into evidence.

The ruling is viewed as critical for the prosecution, which has relied heavily on forensic evidence to tie Heuermann to the long-unsolved murders. The trial is expected to be one of the largest and most closely watched in Long Island’s history.


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