The stomach-churning notes accused Gilgo killer Rex Heuermann kept about grisly murders — including morbid ‘lessons learned’ New York Post Extra Time: Disturbing details in Gilgo Beach murders case; brain implant offers major breakthrough WABC-TVGilgo Beach Serial Killing Suspect Is Charged With 2 More Murders The New York TimesSuspected Gilgo Beach serial killer Rex Heuermann charged with 2 additional murders of Jessica Taylor, Sandra Costilla – 6abc Philadelphia WPVI-TV