Why should the cops have to risk there lives, with only a backbone and balls? If they had guns, it would be very simple: "Put the knife down, and lay on the ground. If you approach with the knife, you will be shot."
Seems pretty simple to me. 
It is very simple - yes.
If they had some brains & a bit of bravado they could've easily delt with Mr Dindu
instead of running around like headless chickens
Agree if they had guns your reasoning is great.
only let down by the number of cops who shoot dead 1st then ask.
Nowt wrong with shooting anyone who is a clear threat to others if they wont
listen & comply - lots wrong in just shooting everyone in all situations.