>>> WITH THE SUPERINTENDENT OF NEW JERSEY IS CALLING FOR TONIGHT. >>> FIRST, A BLUEPRINT FOR HIS CRIMES. THE DOCUMENTS PROSECUTORS SAY SUSPECTED SERIAL KILLER REX HEUERMANN USED TO PLAN AHEAD FOR HIS DEADLY ATTACKS. GOOD EVENING. I AM MAURICE DUBOIS. >> I AM KRISTINE JOHNSON. INVESTIGATORS SAY THEY FOUND THE HARD DRIVE IN REX HEUERMANN'S HOME WHICH INCLUDED CHECKLIST OF THINGS TO DO BEFORE, DURING AND AFTER THE KILLING. >> THIS CAME AS TWO MORE MURDERS WERE LINKED TO HIM, JESSICA TAYLOR AND SANDRA COSTILLA. >> Reporter: PROSECUTORS SAY INDEED, REX HEUERMANN KEPT A GRUESOME ROAD MAP FOR MURDER, DETAILING PREPARATION, EXECUTION, EVEN HOW TO CLEAN UP AFTERWARDS BUT PROSECUTORS SAY TECHNOLOGY WAS THE KEY TO CRACKING THESE CASES. IN COURT, REX HEUERMANN HAD A BLANK STARE INTERRUPTED BY US -- AND OCCASIONAL SMIRK AS HE FACED MURDER CHARGES OF JESSICA TAYLOR AND SANDRA COSTILLA. >> THIS YEAR HAS BEEN 21 YEARS SINCE SHE WAS TAKEN FROM US, LONGER THAN THE CHANCE SHE GOT TO BE ALIVE. WE CAN'T EXPRESS WHAT THIS DAY MEANS AFTER HOPING FOR ANSWERS. >> Reporter: SOME OF THE DETAILS OUTLINED WERE THE M.O. OF A MONSTER. BONDAGE, DISMEMBERMENT AND MUTILATION ON WHAT AUTHORITIES CALL A MURDER MANIFESTO THEY FOUND WITH SICKENING NOTES, LIKE REMOVE HEAD AND HANDS. REMOVE MARKS FROM TORTURE, AND USE HEAVY ROPE FOR NECK AND TO GET SLEEP BEFORE HUNT. TOO TIRED CREATES PROBLEMS. >> WE HAVE AN INDIVIDUAL WHO WE ARE ALLEGING METICULOUSLY PLANNED AND EXECUTED SIX SEPARATE MURDERS. >> Reporter: THE MURDER CARRY -- TRAIL NOW CARRIES SOME 40 MILES FROM GILGO BEACH, BUT THE PASSAGE OF TIME PROVIDED PROSECUTORS WITH A BREAKTHROUGH. NEW DNA TECHNOLOGY LINKED HAIR ON BOTH WOMEN'S BODIES TO HUBERMAN. >> HERE IS OFTEN FOUND AT CRIME SCENES BECAUSE PEOPLE'S HAIR ALL THE TIME. >> Reporter: FRENZY AND DNA EXPERT SAYS DNA HAS BEEN CRUCIAL TO CRACKING THE GILGO BEACH CASES. >> DNA IS REALLY THE GOLD STANDARD OF PHYSICAL EVIDENCE THAT CAN BE USED TO MATCH AN UNKNOWN AND KNOWN BODY WITH THE SOURCE OF THE HAIR. >> Reporter: PROSECUTORS SAY THE NOTES THEY FOUND ECHOED THE WORDS OF A BOOK THEY DISCOVERED IN HEUERMANN'S HOME OFFICE, THE CASES THAT CONTEST BY JOHN DOUGLAS, AN EXAMINATION OF SOME SERIAL KILLERS. >> THE BLUEPRINT SUGGESTS THAT HE IS KILLED MANY MORE PEOPLE THAN WHAT YOU SEE HERE. >> INDEED, PROSECUTORS BELIEVE ANOTHER VICTIM, BELLA >> REPORTER:, WHOSE REMAINS WERE DISCOVERED NEAR THE BODY OF TAYLOR IN MANORVILLE. HE HAS NOT BEEN CHARGED IN THE DEATH OF MAC BUT PROSECUTORS INDICATE HE IS A SUSPECT.
