Comment by kreetx
I think he did have his hand(s) on the officer right after he raised it. To me this "protective raise of the hand" looked like taking his hands off of the officer. Also, while Alex may have had protectiveness as a thought in his head this may have not seemed so to the officers.
Regarding shooting, what seems clear that shooting started after the gun was taken from Alex. At the discovery of it an officer also shouted "gun", after this guns were drawn and then shots were fired. Which gun went off first doesn't appear from the videos, but after the first one did, I assume that the rest of the shooting was due to the first shot being interpreted as the victim starting shooting, as not all of the officers saw that the gun had already removed.
Still, don't bring a gun to a protest, don't engage in any physical activities with law enforcement, don't stop them from doing their work, don't walk and whistle along..
So why did you claim Alex' gun went off? You have been spreading gross misinformation. Maybe take a step back and reflect before you come up with new theories.