Here's what to do if you see a red flag for a mass shooting — and examples of what those warning signs are
The mother who was concerned about her son's weapons. The woman whose boyfriend told her he had an urge to hurt others. Sometimes the people involved report their concerns to authorities, but more often -- according to former FBI executive Katherine Schweit -- they do not. Schweit says when it comes to preventing incidents of mass violence, community involvement is key.
Shooter's ex-girlfriend: He knew shootings were horrific 01:28What can be doneKoren compared the mindset that leads someone to commit mass violence to a highway with on-ramps and off-ramps. Law enforcement can't control how many on-ramps are on the road, he said. So, he sees his job as creating as many off-ramps as possible. If police find evidence of a crime or a credible threat, an arrest can be one of those exits.
El Paso suspect's mother called police concerned about gun. 01:48The limitationsEven with the available intervention methods, there's a thin line between preventing crime and infringing an individual's civil liberties. And though Koren says departments like his will run leads from the smaller suspicions to the most immediate concerns into the ground, state laws and the Constitution regulate how -- and what -- officers investigate.
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