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 1:56 20-year-old killed, teen critically hurt in Northbridge double stabbing 1:50 Man found shot to death in Taunton shed 1:43 Authorities respond to incident in Northbridge 0:49 Bowling alley reopens 6 months after mass shootings in Lewiston, Maine 2:27 Mother speaks out after school shooting threat in Milton