Riverhead, New York —

Evidence derived from cutting-edge DNA technology that prosecutors say points directly at Rex Heuermann being the Gilgo Beach serial killer will be admissible at his trial, a Suffolk County judge ruled Wednesday.

The decision by Suffolk County Supreme Court Judge Timothy Mazzei is an important win for prosecutors and a blow for the defense team that challenged the validity of this type of technology that specializes in extracting nuclear DNA from damaged or hard-to-get samples, such as rootless hair.

It was these types of individual stray hairs that were found on six of the seven victims prosecutors say Heuermann killed, according to court records. Heuermann is charged with murder in the deaths of the seven women and has pleaded not guilty.

Heuermann’s defense a

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