This post is attempting to view the incident through the eyes of the officers involved.
The altercation began with a hose soaking and ended tragically.
Why?
The deceased's tox screening provides the why.
As noted in the testimony, once officers were on the scene they couldn't leave with the suspect in such a neurotic state.

I just have to add that I've controlled more male suspects with a kick to their groin than I can count. Works!
I agree that officers need the latitude to use greater force without fear of castigation or a law suit.