This is just another racist CNN hoax. For an complete analysis showing these to liars were about 250 feet away from the shooting and had their line of sight blocked by one or more buildings, see:
http://theconservativetreehouse.com/2014/09/11/cnn-appears-desperate-to-assist-benjamin-crump-and-daryl-parks-with-fictitious-narratives-around-the-mike-brown-shooting/
I don't understand.