Rex Heuermann admits he is the Gilgo Beach serial killer in a guilty plea twist. The plea averts a September trial and culminates a 15-year investigation that captivated the country. Rex Heuermann admitted to strangling all of his victims, dumping some in burlap along Long Island’s Ocean Parkway, and dismembering others, over the course of nearly two decades. #nbc4ny #rexheuermann #longisland