After becoming suspicious of his daughter’s behavior, a Maryland father discovered her journal detailing plans for a Columbine-style school shooting and immediately notified authorities—underscoring the role parents, friends, and close associates play in countering violence. In March, Nicole Cevario was arrested for planning to conduct a mass shooting at Catoctin High School in Thurmont, Maryland. She has been charged with possession of explosive and incendiary materials, with the intent to create a destructive device.
The New Jersey Office of Homeland Security and Preparedness breaks down mass shootings into two categories, ideological and non-ideological. This provides a clarified awareness of both ideological and non-ideological mass shooting incidents across the US, and the opportunity to separate ideologically motivated shooting into its own category for counterterrorism purposes.
Mass shooting incidents which occurred domestically between January 2015 and June 2016 were analyzed using both of NJOHSP's mass shooting definitions. Based off the NJOHSP's definitions, there have been 38 incidents of non-ideological mass shootings and been seven incidents of ideological mass shootings. Of 45 total incidents since January 2015, 42 percent occurred on the East Coast.
This infographic shows how NJOHSP distinguishes between ideological and non-ideological mass shootings in order to analyze mass shootings that could be linked to terrorism.