High potential for circular reasoning on this one...Like that's going to gain him anything except a torrent of lead from the three other cops nearby? Go ahead and think it's okay if you want, but somewhere in that echo chamber of your... thinking there ought to be a molecule of prudence instead of a constant stream of radical constitutional narrowness.
As I’m bored I’ll continue to add to the silliness of the ever changing question as stated a few posts up. I totally agree with what OHEng stated in the quoted here and will just add to the bolded part.The question as I understood it was posed as Joe Citizen is observing a cop taking an action that Joe thinks is going to have lethal results... the cop is killing the guy, and the question was, is it (or not) "okay" to shoot at the cop. I presume by "okay" the questioner really meant justifiable.
As was made abundantly clear, trying to do that is going to get you shot at least, killed at most. So I suppose it would come down to the question of what are you willing to die for? For some guy you don't know being choked out? Maybe you.
It's going to be hard to press your defense in court if you're pushing up daisies. Something tells me the likelihood of second guessing police actions to the point of using deadly force isn't going to go well for you in court, on the off chance you did survive the encounter.
Then you shifted the question to what if it was a loved one being kneeled on? Well you have the same problems, you're going to get shot or killed and if you're lucky enough to survive you'll be in for a court fight you better win or you'll be pressing license plates the rest of your now thoroughly wounded life. Who's under the knee isn't going to matter.
Then the question shifted to what if it was Joe Citizen himself. I would answer it this way; if it is my life on the line and I want to live, then I don't give a fig about what the legalities are or what my chances are because it's die doing nothing or die trying to stay alive. That is always a unique situation completely different than when it's someone else's life at stake. That said, you still have the very same hurdles to overcome... getting shot/killed by the other three cops and if you live, a court battle you must win or live the rest of your days behind bars.
If I had to bet on it, my money would be on such a person in either of the three scenarios getting killed by police at the scene.