I've been reading and contributing to this thread but without watching the video. Finally got round to it.
Is this a joke?
The entire confrontation between the cop and Williams happens off camera!
How can anyone say what happened based on this?
Like with Bin Laden; it sounds when you don't know much about it like an execution. An unarmed man or man with a folded knife; gets shot by an armed man.
But if you have a knife or are known to use guns and suicide bombs the fact is; if an armed man confronts you, anything other than keeping your hands in view without a weapon, is going to get you shot. People simply don't have fast enough reactions to wait till they can positively identify what is in the hand.
If Williams had the knife in his hand and kept coming at the officer, the officer would have no option but to shoot.
And how can you say the cops knew he was no threat once he was down? They didn't know the extent of his injuries. He might have popped up and rushed at them.
As for the idea that someone has to be super trained to stab someone? You have someone stood in front of you and you have a knife. Tell me; what are the chances of you missing? But it's very easy to miss with a gun.
Also bullets don't inflict injuries as massive as a knife can. Your gun means you may have to hit him several times to get him to stop. Anyone, with no training, can kill you with one swipe of a knife.
qjs