1: He was killed in a chase and gunbattle with police that began with reports of an  officer down  at MIT . 2:  I'm serious ,  Meng testified that the man told him moments before admitting to being the Boston Marathon bomber . 3: Dun Meng says one of carjackers admitted to being a bomber and to killing an MIT officer .
1: He 2: the man 3: one of carjackers