A New York judge has allowed DNA evidence obtained through advanced techniques into the forthcoming murder trial of the man accused of being Long Island’s Gilgo Beach serial killer. A New York State Supreme Court justice handed down his decision Wednesday in the case against Rex Heuermann in Riverhead court. The 61-year-old Manhattan architect was arrested more than two years ago and has been charged in the deaths of seven women in a series of killings that prosecutors say spanned decades. Most of the women’s remains were discovered along an isolated parkway not far from Gilgo Beach and Heuermann’s home in Massapequa.