Deaths : Police : 2 ( 4 injured and 2 civilians killed ) Dorner : 1 April 18 , 2013 . After killing three civilians and injuring hundreds during the Boston Marathon bombing on April 15 , brothers Dzhokhar and Tamerlan Tsarnaev shot and killed a police officer on the campus of MIT . Later in the night they engaged in a shootout with officers in Watertown , Massachusetts where they injured 3-5 officers and Tamerlan Tsarnev was killed while Dzhokhar Tsarnev was arrested the next day . Dzhokhar Tsarnaev was later convicted for bombing the Marathon , and was sentenced to death
Boston Marathon bombing
Boston Marathon bombing
Shootout