the majority of gun cromes do not occur in gun free zones, that research was done by the pro gun lobby.
Here is a non partisan view:
Corcoran said, "Most of these mass shootings take place in arenas where you're not allowed to have a concealed weapons permit."
Corcoran cites research by an advocate for gun rights who used a strict definition to define places where guns were not allowed. In reality, there are places where concealed weapons are permitted, places where police or security officers openly carry weapons, and places where concealed weapons are not permitted. Additionally, there are different ways to define mass shootings.
We found that advocates for more gun control analyzed the data and reached different conclusions.
Our assessment is that it is difficult to draw broad conclusions about the motivations of the perpetrators of mass shootings or whether they are influenced by gun restrictions. We rate Corcoran’s statement Half True.
https://www.politifact.com/florida/...do-most-mass-shootings-happen-gun-free-zones/