CAMBRIDGE (CBS) - An MIT police officer shot and killed Thursday night has been identified as Sean Collier, 26, of Somerville.
Collier was found in his vehicle near the Stata Center on campus around 10:30 p.m. He had several gunshot wounds and was pronounced dead at Mass. General Hospital.
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A written statement by the Middlesex District Attorney's office describes what happened next:
Authorities launched an immediate investigation into the circumstances of the shooting. The investigation determined that two males were involved in this shooting.
A short time later, police received reports of an armed carjacking by two males in the area of Third Street in Cambridge. The victim was carjacked at gunpoint by two males and was kept in the car with the suspects for approximately a half hour. The victim was released at a gas station on Memorial Drive in Cambridge. He was not injured.
It is now believed that vehicle was carjacked by the two Boston Marathon bombing suspects, brothers Tamerlan and Dzhokhar Tsarnaev.
Authorities say that explosives were thrown from the car while police were in pursuit. There was then a gunfight in Watertown. One of those suspects was killed and the second brother was at large Friday morning.
Officer Sean Collier joined the MIT police force in January of 2012. Prior to that he was a civilian employee of the Somerville Police Department. MIT Police Chief John DiFava described Collier as a "dedicated officer who was extremely well liked by his colleagues."
Collier was a 2009 graduate of Salem State, where he earned a criminal justice degree with honors.