Brothers Tamerlan Tsarnaev, 26, left, and Dzhokhar A. Tsarnaev, 19, right, were identified as the suspects in the Boston Marathon bombings that killed three people and wounded more than 180 others on April 15, 2013. Four days later, the FBI enlisted the public's help and released photos
and videos of the two young men, who were seen carrying backpacks as they mingled among revelers at the marathon. A few hours later, the brothers engaged in a long night of violence that included allegedly killing an MIT police officer on campus in Cambridge, Mass., stealing a car at gunpoint, injuring a transit officer in a firefight and throwing explosive devices at police during their getaway attempt, authorities said. Tamerlan Tsarnaev, 26, died during the gunfire exchange and Dzhokhar Tsarnaev was apprehended by authorities on April 19, 2013.