Every OIS is unique in its own way which is why they are scrutinized individually. Not following a cops orders is actually a fairly common, we encounter it nearly every day, especially those that are intoxicated or under the influence of narcotics. Most of theses situations end without any injury or death and we just have to utilize other tools (verbal judo, tazer, hands, baton, pepper spray, etc.). I go hands on with people fairly regularly because lets face it, no one really want to get arrested. Last week alone I had to fight a drunk driver after they fled the scene of an injury accident, a guy who threatened his wife with a knife and had the "my home my rules' mentality when I showed up, and then had to forcibly extract someone from a vehicle when their warrants were confirmed that they were trying to conceal their dope instead of complying with commands. It happens all the time.
There is usually always some sort of other trigger or action that accompanies also not following orders that lead to a shooting. For example, A police officer has someone at gunpoint in a stolen car. They are telling the person to put their hands on the steering wheel, gun is drawn. Violator is not really following orders, but the cop can see his hands. He suddenly reaches his hand down toward the door pocket where the cop can't see and a location that is extremely common for storing a firearm in the vehicle. Or maybe he then reaches up under his shirt to his waistband. Or down to the floorboard, etc. etc.
Its always a hard choice. Yes, he could be reaching to conceal dope, or maybe is just freaking out, or maybe is trying to show the officer something. But the call has to be made to either wait to see what unknown object he is going to produce and risk getting shot (action vs. reaction), or to shoot and risk shooting someone reaching for his wallet.
In the end, the vast majority of shootings are justified, and you actually hear about very little of them because most of the time its obviously a good shoot, and most do not end in death. Like this one where he tries to shoot the officers after they try to subdue him utilizing clear verbal commands and a tazer. Sometimes its just a tragic, impossible situation and life and death decisions are being made in less than a second with no time to weigh each option and the outcome. Then the decision will be scrutinized after the fact, sometimes by thousands of people who have weeks to hear all the facts and able to think clearly from the safety of their living rooms.
Deadly force is always tragic, however, sometimes necessary and unavoidable.
