If we're going to have guns around, this kind of stuff will always happen, not because all the people carrying are idiots, but because they are human. If you feel your life or livelihood is in danger and are carrying a gun, not reaching for that gun is going to be a harder decision than to do so, whether it's cops or anyone else we're talking about. Once a gun has been pulled, fear takes hold. Fear makes people do crazy stuff. Always has, always will.

As a generally pro-gun guy (in safe places; not on the street), I see this as the best argument against allowing people to carry them in public. Whether you're pro-gun or not, it's hard to argue that every one of the people wrongfully killed in this deal wouldn't be alive today had the first guy not reached for his gun.