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Crime Scene
MIT campus
Clarence Henniger testified that Officer Sean Collier was parked in the plaza beside the Koch building on the MIT campus around 10:20 p.m. Dun Meng recalled seeing police cars with blue lights entering the campus that night. In closing arguments, prosecutors alleged that the Tsarnaev brothers approached Collier's cruiser in a planned ambush to obtain his service weapon.
About
The campus was the setting of Collier's killing, which prosecutors cited in arguing joint participation and premeditation. Defense counsel stated that Dzhokhar Tsarnaev's presence at the shooting would not be contested.