(NewsNation) — Suffolk District Attorney Ray Tierney believes a New York judge's go-ahead to use advanced DNA evidence in their case against accused Gilgo Beach serial killer Rex Heuermann is "significant."

Judge Tim Mazzei delivered the ruling Wednesday, ostensibly boosting the prosecution's case against Heuermann, who is accused of murdering six women from 1993 to 2011.

Tierney joined "Elizabeth Vargas Reports" following the ruling, suggesting "science was on our side."

It is the first time DNA evidence generated through whole genome sequencing has been admitted in a New York court, and one of just a handful of such instances nationwide, according to prosecutors, defense lawyers and experts.

"For criminal forensics in the court, it's new, but the forensics in our courtrooms have been

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