In the Rashard Brooks killing, there wasn't a problem until the LEO lost full control over the situation…when he went to arrest the perp is when he lost full control.
A LEO needs to be better trained in how to handle a perp(without physically damaging him) once they lose total control…all the bets were off…the perp not thinking rationally could have done anything….run away…come back with a dangerous weapon…he could have hi-jacked another vehicle with a mom/child in it…etc…
So, you see, the second he lost control caused his death. no if, ands or buts…if he had gotten arrested..no death…period.
So, If the LEO had better hand to hand combat tactics, the perp would have NEVER gotten loose….hence the LEO would have never lost full control of the situation…arrested…..done and done…
Here is a video(numerous of vids out there, but this one is one of the better ones) of some of the tactics that if well trained LEO's would take the time to learn….handling a perp(no matter how big) would result in far less perp deaths.