That is a cop out, excuse the pun...
Look, the most likely scenerio, that was talked about early on, and is proving as the case goes on to be the correct one is this
Brown, and his friend strong arm rob a store of cigarellos, and as they are walking down the street they are approached by Officer Wilson, in his patrol SUV, and told to get out of the roadway. Then Wilson pulls ahead of them and parks to make sure he observes them following his instruction. Now, these two don't know why he is parked the car, and is observing them, their paranoia tells them they are about to be arrested, during this time the call for the robbery comes over the radio, and these two fit the description, so as Wilson starts to get out to confront them again, Brown punches him back into the car, and struggles for the gun....Now, it is no longer petty theft for robbery, Now it is Assault of a police officer, Attempted murder of a police officer. So, as Brown and his friend start to walk away thinking that they beat up a cop, and can walk away, they hear Wilson order them to stop. Brown being already shot in the hand from the struggle, turns and taunts Wilson saying "What? You gonna shoot me" as he advances toward Wilson, and Wilson as he should shoots Brown until the threat is stopped. period.
Nothing else in my mind is anything other than ridiculous bs.