Article continues below advertisementRex Heuermann, the man charged with seven of the Gilgo Beach murders that have haunted Long Island, New York, for decades, is expected to plead guilty, according to sources.Per new reports, the architect and a married father-of-two from Massapequa Park will enter a guilty plea in the serial killings in a court appearance scheduled for April 8. Newsday revealed on Thursday, March 26, that "family members of women whose remains were found near Gilgo Beach" were recently informed of the development.