Psychologists, working with law enforcement officers, have devised tools to prevent violent attacks. THE PATH TO VIOLENCE details a powerfully effective Secret Service program — the Safe School Initiative — that’s helped schools detect problem behavior. However, shooters like Adam Lanza, Jared Loughner and James Holmes all executed their attacks after they’d left school. Can the gains made by psychologists and law enforcement be extended to encompass parents — terrified of their own children and inadequately helped by mental health and legal systems — and families of violent individuals? Is the country ready for a national conversation about the balance between school safety and civil liberties that interventions, including gun control, require?