Dateline investigates the murders of several women found deadalong Gilgo Beach in Long Island, New York.During The Huntfor the Gilgo Beach Killer, Heuermann's former neighbor JimmyMack speaks out in his first TV interview,telling Dateline that he "immediately" had a bad feelingabout Heuermann. Additionally, Mack revealed that they had a"confrontation" after Heuermann allegedly threatened to cut thetires of a car in Mack's driveway that partially blocked thesidewalk.The special also examines the death of ShannanGilbert, whose remains were found on Gilgo Beach in December2011. Speaking out for the first time since Heuermann'sarrest, Shannan's sister calls for Suffolk County PoliceDepartment to reopen her sister's case.
