Brown was not only unarmed, but, according to medical examiners, he appeared to be in surrender mode when the 6 ft. 4 inch tall young man was shot on top of his head, killing him.
Unarmed? May be. But what about the store robbery he committed a few hours before the incident? Weighing close to 300 pounds, he didn't needed a weapon to rob the store apparently. And the facial injuries received by officer Wilson is a proof that Brown tried to overpower him. I don't think that the medical examiners certified that he was shot after he surrendered. From what I've read, only the eyewitness (the guy who took part with him in the robbery) claimed that he was shot after he surrendered.
Too many second hand information. The case will drag on for months.