Tonight, the mystery and heartache hanging over MIT's campus. >> So tragic, so frightening, so insane. >> After worldrenowned professor Nuno Lo, the head of MIT's plasma science infusion center, was gunned down in the entrance to his building.>> Reported gunshot, father was shot multiple times. >> 48 hours later, the search for his killer intensifying. The 47year-old physicist killed in the upscale Boston suburb of Brooklyn was a father of three daughters and a brilliant researcher according to Bruno Conalv ...

>>> A VERY GOOD MONDAY MORNING TO YOU. WE ARE FOLLOWING BREAKING NEWS FROM HOLLYWOOD OVERNIGHT. >> FAMED DIRECTOR ROB REINER AND HIS WIFE FOUND DEAD INSIDE THEIR HOME. >>> IT IS DECEMBER 15th. THIS IS "TODAY. " >>> STUNNING DISCOVERY. ROB REINER AND HIS WIFE, MICHELE, THE VICTIMS OF AN APPARENT HOMICIDE. THE LAPD LAUNCHING AN INVESTIGATION OVERNIGHT. >> THERE ARE GOING TO BE MANY FAMILY MEMBERS INTERVIEWED. >> STRAIGHT AHEAD, WHAT REINER'S DAUGHTER IS SAYING TO NBC NEWS THIS MORNING AS TRIBUTES POUR IN FOR ...