unless you are a threat, you should not be killed period. He had a switch blade. They tacked him and arrested him. That should have been the end of it. FYI you cannot sever your spine or crush your larynx by banging your head against something. I wonder what bones were fractured. C1-C3? You can have a fractured neck, thorax or lubar without spinal cord injury. I am waiting for more info, but what i have heard thus far has be wanting more . It does not medically make sense.