Rex Heuermann, the Long Island architect and family man accused of being the Gilgo Beach serial killer, will appear in court next month to plead guilty, according to Newsday. Relatives of some of Heuermann's alleged victims informed the paper on Thursday, March 26, about the new development. If true, it could bring to an end what has been a decades-long nightmare for Long Islanders. Newsday reports Heuermann will change his plea during a hearing scheduled for April 8. Suffolk County District Attorney Ray Tierney and Heuermann's defense attorney, Michael J.