That's a procedure for EXACTLY that purpose. And you know what? Michael Brown didnt do that. So he remained a threat. One that had already attacked an armed officer. And he paid the price instead of the officer. (Who ended up paying a very high price for doing his job properly.)
??? The cop makes a split decision to save a life...his own or the public. In those circumstances, NO ONE else can assess the actual threat in that instance. Gee whiz, I hope he lives to provide evidence in court! Those of us, cops or anyone else, can only PRAY PRAY PRAY that we have physical evidence to support our actions if we ever need to use lethal force. Because otherwise, just like the cop in Ferguson, we can end up screwed anyway. Legally or financially (the legal defense costs often cost people their houses).