officecejason van dyke.. charged with murder after prosecutors say y shot mcdonald 16 times in 15 sends.. claims in the report.. that after ordering mcdonald to drop his knife.. the teen continued to.. video shows mcdonald walking away.. van dyke went onto report that.. mcdonald got within "10 to 15 feet of him".. so the officer claims he acted "in defense of his life".. the video then shows mcdonald on the ground. ((nats)) "responding to shots fired.. 10-4." also today.. authorities in chicago.. released this dash cam video of another deadly police-involved shooting from last october.. but announced they determined this shooting w w justified.. calling the federara review.. welcome news. anita alvarez: "anything that we can do to improve police relations with the public, to build confidence in our communities that the police officers are out there doing their job and doing it correctly, i welcome that." on-cam tag: chicago mayor rahm emanuel says he also welcomes the federal investigation.. stating the mutua