This is insane. If the guy had tazed the cop and taken his weapon, he could have killed him and God knows who else! This is truly mad. They never do this when a white guy gets killed.
He had a partner there. He wasn’t alone. If he was alone and there was a struggle for the tazer, maybe. Cops are trained and have tazers used on them. Shooting someone in the back is unjustified, unless they were charging at someone with the intent to maim/kill.