MINNEAPOLIS (WCCO) — Hamline University hosted a presentation on mass shooters Friday night.

Hamline assistant professor Dr. Jillian Peterson and Dr. James Densley from Metropolitan State University spoke about their research study.

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Along with a team of Hamline students, they created a database of 150 mass shooters, based on 50 life variables.

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“What we found is unfortunately there really is no pattern,” Peterson said. “Each person has a really different and unique story. But we did see it was a slow build over time, and then the tipping point seems to be suicidality, that people expressed a desire to die before the shooting.”

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The team discussed crisis intervention and suicide prevention, and spoke about the role of social media during these shootings.