You’re on the wrong website for magical thinking like that. A lone cop doesn’t use pepper spray or a tazer on a 6’4” 292 lb. crazed thug who has already physically assaulted him. He would be stupid (and probably dead) if he did. Brown wasn’t alone either.
There’s been a number of cops who tried to subdue a large male by tasering and ended up dead when the perp withstood the taser charge, overpowered the cop, and took the cop’s gun and shot him.