black teen cedric chatman in 2013. >> he's running as fast as he can away from police and he's shot. >> brian kauffman has been fighting for the release of video. >> approximately three to four seconds elapses and the first bullet is fired. and he is dead within eight seconds of getting out of his car and running. >> we saw the commotion where they heard the gunshots. >> lorenzo davis analyzed the video second by second and says this case cost him his job. >> we felt like it was unjustified shooting. >> davis did the review for the city agency that investigates all officer involved shootings called the independent police refuse authority, or ipra, a former police officer himself, he describe what is's on the video. >> they pulled up alongside of that car. >> chatman was running away from the stolen car he was driving when a police officer open fired.