Who Is The Man On The Ground?

At approximately 10:30 pm on Thursday, April 18, 2013, an MIT police officer, Sean Collier, age 27, was shot and killed on campus in Cambridge, Massachusetts, while responding to a disturbance. Police believe the Boston Bombing suspects, Tamerlan and Dzhokhar Tsarnaev shot the officer five times to get his gun because they only had one gun. It is unclear how many bullets were in Officer Collier’s gun or why the brothers thought the gun would be so valuable they would shoot the officer five times for it and call attention to themselves before their whereabouts were known by police. In the end, the brothers failed to remove the officer’s gun from his holster–their heinous crime was in vain. Mystery continues to surround the death of the MIT officer, however, and the Middlesex DA released today a request for witnesses to the crime.
The first responder to the MIT officer’s call for backup, Officer Collier’s friend and former classmate, Massachusetts Bay Transportation Authority Police Officer Richard Donohue, might have been the only one in a position to illuminate the events as they unfolded in Cambridge that night. By a tragic coincidence, however,