craig futterman said, lunged at officers, had a knife. there was one account early on that he had broken a window of a police car. again, we remember some of the accounts about tamir riceyoung 14-year-old boy shot and killed in cleveland and then you see the video. and it, to me, unmasks a little bit why folks have a little bit of skepticism sometimes against -- about initial accounts. >> because so many of these cases have been captured on video, the public is more aware than ever. i think if you've covered crime for any amount of time, you get used to the idea of the furtive movements. the first thing the police rule out is their narrative of what happened. looking at this video, it's striking how at odds what we see with our own eyes that is with the narrative that he lunged at someone. and i think when you take a look at what's happening in chicago now and people are upset for many reasons that most of the shots happened while he was on the ground, that this video existed for a year. and no movement at all. but it comes on the heel of the boya case where the officer apparently perhaps intoxicated with an unregistered gun fired over his shoulder kills this young gir