.....this description of yours and one other suggest that maybe Wilson could not see well or normally and had to fire so many shots because he knew if the gentle giant got hold of him he was toast!
...”maybe Wilson could not see well or normally”.....
He’d obviously been attacked in the car if reports are true thus far...so he’s already in the mode he needs to be and is trained to be.
An officer wrote in comments that they are trained a certain way to stop a threatening person and that Wilson did exactly what they are trained to do.