The chief concern of the cops in such matters is the safety of the cops. I think this particular guy was just really mad and his anger destroyed his good sense and he really thought he could take out a couple of cops with his little knife--he thought wrong. Tazers are unreliable and the cops wouldnt use them when faced with a "deadly weapon", even if its just a paring knife. Certainly, if he lives, this guy is facing a bunch of charges, so he'd better enjoy the care he is getting in the ICU!
