FORECAST. >>> THIS RIGHT HERE IS THE BREAK THAT FAMILIES WHO LOST LOVED ONES HAVE BEEN WAITING FOR FOR MORE THAN A DECADE. POLICE HAVE MADE AN ARREST IN THE NOTORIOUS GILGO BEACH MURDER CASE. GREG CERGOL IS AT THE COURTHOUSE, AND PEI-ZE CHANGE HAS MORE. JOHN HAS MORE. >> SUFFOLK POLICE AND OTHER AGENCIES SEARCHING THE MASSAPEQUA HOME FOR EVIDENCE THAT MAY FURTHER LINK HIM TO THE KILLINGS THAT STRETCHED OVER A DECADE. THE MAN IN CUSTOMER BY IS REX HUERMAN. .DACTS IS EXPECTED TO ANNOUNCE DETAILS, BUT WE MAY HEAR FROM THE POLICE COMMISSIONER SHORTLY. OFFICIALS ARE EXPECTED TO TIE HEUERMANN TO SEVERAL OF THE BODIES. THEY'RE LOOKING TO SEE IF HE'S LINKED TO SOME OF THE BODIES FOUND WRAPPED IN TARPS. TEN BODIES IN ALL FOUND OVER THE YEARS. NOT ALL ARE LINKED TO THE SAME KIMMER. AMONG THE BREAK. CELL PHONE TOWER PINGS FROM THE SUSPECT TO ONE OF THE VICTIMS' FAMILIES. HE WORKS AS AN ARCHITECT. POLICE A SHORT TIME AGO WERE SEEN IN MIDTOWN MANHATTAN SEARCHING HILLS OFFICES AT FIFTH AVENUE AND 36th STREET. FOR YEARS, POLICE HAVE BEEN LOOKING INTO WHETHER THE SUSPECT LIVED ON LONG ISLAND AND WORKED IN MANHATTAN, COMMUTING THROUGH PENN STATION. A CELL PHONE PING FROM PENN STATE AREA ALSO PART OF THE EVIDENCE. HEUERMANN IN HIS OWN YOUTUBE VIDEO SPEAKS ABOUT HIS LIFE AND FAMILY. HE IS EXPECTED TO APPEAR IN COURT LATER TODAY. THE CHARGES ARE EXPECTED TO BE RELEASED THEN. AGAIN, A POSSIBLE NEWS CONFERENCE IN THE COMING MINUTES, ALSO A NEWS CONFERENCE BY THE DISTRICT ATTORNEY LATER TO DOUGH TAIL THE CHARGES. AN ATTORNEY FOR ONE OF THE FAMILIES SAYS IT'S GOOD NEWS THAT'S BEEN A LONG TIME COMING. BACK TO YOU. >> JONATHAN DIENST IN THE NEWSROOM WITH THE BREAKING NEWS. PEI-ZI CHANG IS AT THE SCENE. >> Reporter: THE SUSPECT WAS ARRESTED LAST NIGHT, BUT THROUGHOUT THE NIGHT AND THIS MORNING, THERE WAS A MASSIVE POLICE PRESENCE. WE HAVE SUFFOLK POLICE LEADING IS THE CASE, STATE POLICE AS WELL AS NASSAU POLICE AND THE D.A.'S OFFICE. THEY'VE BEEN SEARCHING THE HOUSE. WE'VE SEEN DETECTIVES CLOTHED IN PALACIC AND BOOTIES GOING INTO THE HOUSE, BRINGING OUT BAGS OF EVIDENCE. THIS IS THE HOME OF REX HEUERMANN, AN ARCHITECT. PEOPLE IN THE NEIGHBORHOOD ARE COMPLETELY STUNNED. THEY SAY HE HAS LIVED HERE HIS ENTIRE LIFE. HE GREW UP IN THIS HOUSE, ENDED UP BUYING THE HOUSE IN SOME FASHION FROM HIS PARENTS. HE LIVES HERE WITH HIS WIFE AS WELL AS TWO ADULT CHILDREN. OF COURSE, THE FAMILY THAT ARE MOST STUNNED ARE THE ONES THAT LIVE RIGHT NEXT DOOR TO HIM. WE SPOKE TO THEM EARLIER TODAY. HERE'S WHAT THEY TOLD US. >> THE GUY PRETTY MUCH KEEPS TO HIMSELF. WE SOO SAY HELLO TO EACH OTHER ONCE IN A WHILE, THAT WAS IT. MORNING PLEASANTRIES. IT'S AN INCREDIBLE STORY, SOMETHING LIKE 11 PEOPLE, SOMETHING LIKE THAT? LIKE I SAID, WE'RE SHOCKED. THIS IS A VERY, VERY QUIET NEIGHBORHOOD. EVERYBODY KNOWS EACH OTHER. ALL OF OUR NEIGHBORS, WE'RE ALL FRIENDLY, THERE'S NEVER BEEN A PROBLEM AT ALL. >> Reporter: COMPLETELY STUNNED AND CONCERNED THAT HE COULD HAVE BEEN LIVING IN PLAIN SIGHT RIGHT HERE IN THIS NEIGHBORHOOD FOR SO LONG. WE ARE TOLD THAT SUFFOLK COUNTY POLICE COMMISSIONER RODNEY HARRISON AS WELL AS THE COUNTY EXECUTIVE, THEY'RE GETTING READY RIGHT NOW TO MAKE SOME COMMENTS TO THE MEDIA. THAT IS EXPECTED IN THE NEXT COUPLE OF MINUTES. FOR NOW WE'RE LIVE FROM MASSAPEQUA PARK. >>> LET'S GO TO THE GREG CERGOL AT THE COURTHOUSE. >> Reporter: WE'RE EXPECTING SOME KIND OF COURT APPEARANCE, ADAM, THOUGH THE SUFFOLK D.A. SPOKESPERSON HAS YET TO CONFIRM AN ARREST HAS BEEN MADE, SAYING THERE'S ONLY BEEN A SIGNIFICANT DEVELOPMENT. HOWEVER, SHE DID DIRECT US HERE TO RIVERHEAD, PRESUMABLY FOR THE ARRAIGNMENT OF THE SUSPECT, BUT RIGHT NOW WE DON'T HAVE A TIME FOR WHEN THAT WILL HAPPEN. WE HAVE SEEN COURT OFFICERS AND SUFFOLK SHERIFFS GEARING UP FOR WHAT'S EXPECTED TO BE A MEDIA CRUSH HERE TODAY. THIS GILGO KCASE, HAS GARNERED ATTENTION AROUND THE WORLD WITH DOCUMENTARIES AND PODCASTS ABOUT THE MURDERS. WE'RE EXPECTED A COURT APPEARANCE EXPECTED SOMETIME THIS AFTERNOON, AND THE SUV FOX D.A. WILL HOLD A NEWS CONFERENCE AFTER THAT AT 4:00 IN THE