He was reaching for the gunshot wound, then he got nailed in the back by a Taser.
What the hell's wrong with you?
How do you know he was shot first? There is no audio from the helicopter in the video provided.
Once he pulled his coat back like that, knowing that they were armed, knowing that they we threatening to resist with arms, and knowing they had just fled an arrest, he was going to get shot. No cop is waiting to find out if the cowboy thinks he is QuickDraw McGraw in that scenario. You are mistaken to think otherwise.
He should have done what the others did and not fled. Once you turn it into a police chase with guns it's not likely to end well.
And I say he should have done that in the event he didn't mean what he said when he said he wasn't going to go to jail.