I understand there were two armed police officers on the grounds at the time of the shooting.
I wasn’t there, so I wouldn’t know. You have to admit he is right though. Also it depends on where the police officers were at the time of the shooting.
I'd like to see verification of that, because if true it would be unusual.
We hear all of the same arguments from both sides after every one of these shootings. But I think perhaps the most valid observation is that most mass shootings seem to occur at schools and other "gun free zones."