How do we find the shooters before they kill? How about making it a crime to create a kill list, like the one shooter made who was expelled from school? I'm not in favor of screening people for past or current psychological treatment - heck, those are the ones who are getting help. In some cases, the most dangerous ones are the ones who aren't being treated at all. But give school administrators some clear guidelines and police support to get students who threaten others not only out of school (where they then have even more time to plan their crimes), but locked up and off the streets, too. High school assistant principals could tell you horror stories of students they did their best to remove from the opportunity to hurt others but their efforts were thwarted by either district administration or law.