This incident pretty much kills the "Good guys with guns"/"Gun free zones are bad" myth.

[Tommy_Carcetti]

15. New FBI Report Casts Doubt on NRAs Good Guy Stops Bad Guy Nonsense

http://www.huffingtonpost.com/mike-weisser/fbi-report-active-shooters_b_5900748.html

Most of the media coverage of this report will no doubt focus on the FBI’s claim that the number of incidents and victims totals of these shootings has of late been going up, with the annual number of incidents averaging 7.5 between 2000 and 2006, and jumping to an annual average of 16.3 between 2007 and 2013. The increase in casualties each year is even more dramatic, with the totals (not including the shooters) going from 247 between 2000 and 2006 up to just under 800 over the following seven years. It should be noted, incidentally, that the FBI defines an “active shooting” as an incident during which “both law enforcement personnel and citizens [my italics] have the potential to affect the outcome of the event based upon their responses.” Which is exactly what Wayne-o claims his gun-toting compatriots are all about.

Here’s how these incidents ended. More than half (56 percent) were terminated by the shooter who either took his or her own life, simply stopped shooting or fled the scene. Another 26 percent ended in the traditional Hollywood-like fashion with the shooter and law enforcement personnel exchanging gunfire and in nearly all of those situations the shooter ended up either wounded or dead. In 13 percent of the shooting situations, the shooter was successfully disarmed and restrained by unarmed civilians, and in 3 percent of the incidents the shooter was confronted by armed civilians, of whom four were on-duty security guards and one person was just your average “good guy” who happened to be carrying a gun.