According to the U.S. Department of Homeland Security, an active shooter is "an individual actively engaged in killing or attempting to kill people in a confined and populated area." Federal Bureau of Investigation (FBI) study identified 250 active shooter incidents in the U.S. from 2000 – 2017 that killed or wounded a total of 2,217 people. And the majority of incidents ended before law enforcement arrived. To help prevent loss of human life in an active shooting incident, companies and individual employees must take steps to plan and prepare for these types of events.