I wonder if we might come up with a set if irrefutable FACTS that may be cited to address the emotional arguments of the anti-gun crowd?

This would be particularly effective if some key facts congeal into common denominators that affect/influence several of these mass shootings.

For example, here are a couple of things I was thinking about:

* Mental instability of the shooter
* Gun-free zone
* Existing laws worked properly

In the case of the CT shooting:

* Shooter was known to have some form of mental disorder in advance of the shooting
* The site of the shooting was a school that prohibits firearms
* The shooter was denied purchase of firearms several days prior to the incident

In the case of Aurora shooting:

* Shooter was clearly identified with serious and dangerous mental issues in advance of the shooting
* The site was a theater with a posted anti-gun message
* In this instance, it appears the purchases were all legal and there were no denials.

What about others?

I know I can, and probably will later, do the research to find similar fact patterns with recent mass shootings, but I throw this out to y'all to fill in any gaps and identify any other common characteristics that might be illuminating.