Who gave the order to stand down, did it come from a higher rank? Being ordered to stand down is not logical? At your employment when you are given specific instructions and do not follow them, they pat you on the back for that? On top of that you don't follow an instruction and kill someone and your employer cool with it? Where.they.do.that.at.
You are correct, he did not pose a threat when they shot him, they still did though didn't they. Like I said before, its must be real tough being an armed police officer with an armored vehicle, getting rammed at a whopping 5 mph- how scary.