Police now think they have the answer. Investigators now believe that Officer Collier was killed because the two bombing suspects wanted to take his gun.
Tamerlan and Dzhokhar Tsarnaev only had one real gun and one pellet gun. Investigators believe because the officer's holster had a locking system, they apparently couldn't get the gun out.See. We've said all along. When determined law breakers are intent on acquiring guns, they improvise. In the case of the Tsarnaevs, they apparently resorted to murder.
Just like Newtown's Adam Lanza.