I think Wilson freaked out and used excessive force. In his retelling — and most likely in his own mind as events were unfolding — he turned Brown into a cartoon character, a CGI-enhanced Hollywood supervillain.
A public trial might have shed further light on the case, but thanks to Prosecutor McCulloch’s refusal to recuse himself due to his obvious conflict of interest, it looks like true justice will not be served. More on his misuse of the grand jury process here.
Are you a cop who killed an unarmed black kid? Better call Police-Pal Prosecutor!