Really? There was a mental case that threw a shopping cart into the street, ran into the pizza joint and threatened an employee with a knife. Guess what happened? Cop shot the white guy dead and the family wonders why they didn't deescalate the situation. Personaly, if I was the officer I would have pulled the taser. But when your a police officer, that split second decision is tougher than you might think. Kudos to those involved in this case and not senselessly killing another person for nothing at all.
In the eyes of a police officer it's a damned if you do or damned if you don't world. Same goes for the President.