A New York district attorney announced Friday that after 27 years, investigators have identified the woman previously known as "Jane Doe Number 7" in the Gilgo Beach investigation. She is the seventh victim identified so far, but the connection to the man arrested for some of the murders, if any, is still a mystery. Mary Ellen O'Toole, a retired senior profiler for the FBI, and Matt Murphy, a former homicide prosecutor, join "Elizabeth Vargas Reports" to discuss the development. #GilgoBeach #LongIslandSerialKiller #RexHeuermann More #VargasReports: newsnationnow.com/joinus Anchor Elizabeth Vargas delivers the biggest stories, without bias or opinion. Watch "Elizabeth Vargas Reports" every weeknight at 6p/5C on NewsNation. #VargasReports NewsNation is your source for fact-based, unbiased news for all America. More from NewsNation: newsnationnow.com Get our app: trib.al/TBXgYpp Find us on cable: trib.al/YDOpGyG How to watch on TV or streaming:...