Investigators Tearing Up Rex Heuermann’s Backyard And Digging Deep Holes To Search For Clues And Evidence. Tearing it apart and digging deep! Drone footage of serial killer’s backyard #RexHeuermann #gilgofour #gilgobeachmurders #longislandserialkiller #lisk #gilgobeachkiller pic.twitter.com/aQqZImxWTA — Starling Zain (@StarlingZain) July…