We have studied every mass shooting since 1966. Here's what we've learned about the shooters
In the last week, more than 30 people have died in three separate mass shootings in Gilroy, El Paso and Dayton, Ohio. We believe that analyzing and understanding data about who commits such massacres can help prevent more lives being lost.
For two years, weve been studying the life histories of mass shooters in the United States for a project funded by the National Institute of Justice, the research arm of the U.S. Department of Justice. Weve built a database dating back to 1966 of every mass shooter who shot and killed four or more people in a public place, and every shooting incident at schools, workplaces, and places of worship since 1999. Weve interviewed incarcerated perpetrators and their families, shooting survivors and first responders. Weve read media and social media, manifestos, suicide notes, trial transcripts and medical records.
Our goal has been to find new, data-driven pathways for preventing such shootings. Although we havent found that mass shooters are all alike, our data do reveal four commonalities among the perpetrators of nearly all the mass shootings we studied.
First, the vast majority of mass shooters in our study experienced early childhood trauma and exposure to violence at a young age. The nature of their exposure included parental suicide, physical or sexual abuse, neglect, domestic violence, and/or severe bullying. The trauma was often a precursor to mental health concerns, including depression, anxiety, thought disorders or suicidality.
https://www.latimes.com/opinion/story/2019-08-04/el-paso-dayton-gilroy-mass-shooters-data