Study: Remove gun-free zones=fewer mass shootings. This is hardly a surprise to those who follow the subject. Read the killers’ manifestos. Observe which locations they attack. The nearest multiplex theater? No, the one with the “gun-free zone” sticker on the door. The killers may or may not be crazy, but they are not stupid. No one wants to face armed defenders if he can avoid it. So the question is this: Which is more important, reducing mass murder, or furthering an anti-gun agenda?

https://crimeresearch.org/2023/07/is-there-a-policy-that-reduces-mass-public-shooting-deaths/