The founding fathers knew what they were talking about! Why do you think they say "if you don't know history then you are doomed to repeat it"? Think about what all those old saying mean! They were gifts from out ancestors!! History DOES repeat itself but an educated patriot can keep a watchful eye on his republic and protect it, Many will try to corrupt and steal it!!
Even if Mike Brown really did rob that convenience store, I really don't give a shit. Why? Because he's dead now. Even if the cop had known that he was allegedly a robbery suspect, we would be having almost the exact same discussion. Why? Because he didn't deserve to get killed over that. Unarmed robbery does not equal death penalty.