Interestingly enough, I'm not so sure this is the case. I've been mentally toying with the idea of an in-house pre-paid school psychologist and mandatory annua

Interestingly enough, I'm not so sure this is the case. I've been mentally toying with the idea of an in-house pre-paid school psychologist and mandatory annual screenings for all students. We already do this for hearing and vision screening, and sometimes even dental screening and care. That or there are other ways to create intervention opportunities. There are many proven mental health therapeutic interventions that could be implemented in a classroom format. Lots of self-journaling to various prompts, etc. The class can focus on stress management strategies, organization, and other sorts of long term planning, reflection, conflict resolution and other life-success skills. Self-assessment quizzes could be administered to screen for depression, anxiety, dark-triad type stuff and then results evaluated by an actual psychologist with appropriate followup as needed. I just about guarantee that would do more to prevent school shootings than any gun control proposals on the table. For the amount we spend on schools to have school resource officers (like providing extra opportunities for students to have run-ins with the law is helpful?), and all the security and surveillance infrastructure, and ridiculous admin costs, I think it wouldn't be nearly as expensive as you might think.