The seminar by the Illinois EMA and Illinois Law Enforcement Alarm System is the first of its kind. Organizers say it's more important than ever for people to know the warning signs of violence and report it to authorities.
Research by the Secret Service reveals, in most cases, offenders had a noticeable change in their behavior. Leaders say behavioral threat assessments started heating up after the Virginia Tech shooting in 2007.
It's recommended all workplaces, including schools and daycares, have an emergency plan in place and run drills on a regular basis.
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