the punks from Russia involved in the sporting event bombing, only had one handgun as they were looking to get out of Boston. How to solve this problem? the older brother, with a hidden handgun, walks up to a police officer, as if to ask directions, and point blank assassinated the officer. the officers duty belt, had a system of locking the handgun to the holster, that the punks could not figure out yanking on it, so they fled empty handed.
they killed a police officer, to try to get one more handgun, and failed. the police officer died, because these punks needed a gun.
That ranks right up there with the tragic stories of this event.
to the LEO's that serve our great nation, I am sorry your job sometimes requires you give more than should be allowed.