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Research

Home > Archives for Research

Why mass shootings stopped in 2020 — and why they are now roaring back

March 23, 2021

Mass shootings, which had become far less frequent in 2020, have come roaring back. On Monday, a gunman opened fire at a grocery store in Boulder, Colo., killing 10. And this comes on the heels of the Atlanta spa attacks last week that killed eight. We’ve been studying mass shootings, defined as four or more people shot and killed in a public … [Read more...]

Filed Under: By Jill and James, Research, News Tagged With: mental health, psychosis, pandemic, social contagion, Mass shootings, contagion, mass shooters, crisis intervention

Mass Shooter Database Version 3 is Now Available

March 10, 2021

What's new? Version 3 includes two new cases that met our definition from 2020 – far fewer mass shootings than in previous years. A new variable called “insider/outsider” was added to capture whether the perpetrator had an existing relationship with the site of their shooting. At K-12 schools, 85% of mass shooters were insiders. At colleges … [Read more...]

Filed Under: General, By Jill and James, Research Tagged With: data-driven solutions, School shootings, mass shooters, victims, psychosis, insider, Mass violence, mass shooting, Mass shootings

With schools returning to in-person learning, the threat of classroom shootings follows. Here’s how experts say we can prevent them from happening.

March 3, 2021

The Violence Project co-founder Jillian Peterson told Insider how threat assessment teams can help prevent school shootings, as well as prevent further tragedies like suicide, self-harm, and other forms of violence. "We really focus on things like safe, warm environments with strong relationships between students and adults so people feel more … [Read more...]

Filed Under: Research, News Tagged With: Threat Assessment, risk factors, relationships, pandemic, violence prevention, School shootings, suicide prevention

Armed officers triple mortality in school shootings, study finds

February 25, 2021

"Nearly three times as many people die in school mass shootings when an armed officer is present. That’s the finding of a study of every case since 1980, led by Hamline University professor Dr. Jillian Peterson. Dr. Peterson joins Dave Ross to discuss why more weapons means more violence, even the hands of 'the good guys,' what to expect when … [Read more...]

Filed Under: Research, Watch or Listen Tagged With: suicidality, school safety, Policy, Gun violence, Policing, school resource officer

New research finds armed officers increases likelihood of mortality at school shootings

February 17, 2021

More people die in school shootings where an armed officer is present than when there isn’t, according to a new study published Tuesday that adds a surprising element to the conversation about whether school resource officers make schools safer. The study, led by Hamline University criminal justice professor Jillian Peterson and published in … [Read more...]

Filed Under: Research, News Tagged With: school resource officer, School shootings, school shooter, school safety, Policing

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