So I looked up that 3% study. Here it is.
https://www.fbi.gov/news/stories/20...r-incidents-in-the-u.s.-between-2000-and-2013
It is being reported on very disingenuously. First, it is only refering to "active shooter events" which it defines as
“an individual actively engaged in killing or attempting to kill people in a enclosed and populated area.” Though this study did include some outside situations.
Here is the breakdown of how such events come to an end:
56% of the time the shooter ends it by taking his own life or leaving the scene.
26% of the time police engage and stop the shooter.
13% of the time unarmed civilians disarm and restrain the shooter.
3% of the time an armed civilian stops the shooter.
So, that
doesn't mean that 97% of the time a good guy with a gun tried to stop the shooter and failed. And looking at their pie chart of where such shootings occur, it is obvious that gun free zones are a favorite place for such violence. And since carrying a gun into a gun free zone is illegal "good guys" tend not to do it.
Also, unless I am missing it, the study doesn't differentiate between jurisdictions where CCW is authorized and easy to obtain and where it is not. The worst gun violence happens in places where CCW is not easily obtained. It also doesn't state how many good guys with guns were at the scene who tried and failed or didn't even try. After all, just because CCW is authorized somewhere doesn't mean anyone is actually carrying.
So, the 3% stat is pretty useless.