Sean Collier April 18, 2022 6:08 pm MIT Officer Sean Collier Remembered 9 Years After His Death Sean Collier was shot during the manhunt for the Boston Marathon bombing suspects. US & World Videos 3:38 Tech Tuesday: TikTok testing ‘Notes' 6:39 Boston criminal defense attorney breaks down Day 1 of Karen Read trial 2:36 Karen Read trial begins with opening statements Monday 2:09 Staffer at Kipp Academy in Lynn stabbed by student 1:49 Out-of-control truck smashes sign outside Mass. ice cream shop