NBC Nightly News Full Episode - Dec. 18

TEST >>> BREAKING NEWS AS WE COME ON THE AIR, THE BIG BREAK IN THE BROWN UNIVERSITY SHOOTING. A PERSON OF INTEREST, NOW IDENTIFIED. PLUS A STUNNING TWIST.OFFICIALS NOW LOOKING INTO POSSIBLE TIES TO THE MURDER OF AN MIT PROFESSOR. THE DETAILS JUST COMING INTO OUR NEWSROOM. POLICE IDENTIFYING A PERSON OF INTEREST.THE ALL OUT MAN HUNT TO FIND THE KILLER OF TWO COLLEGE STUDENTS. NOW, THE POSSIBLE LINK TO THE MIT PROFESSOR, GUNNED DOWN IN HIS OWN HOME. A RENTAL CAR SPOTTED NEAR BOTH SHOOTINGS.>>> ALSO, THE FIERY ...