Mass Murder Database Reveals Mass School Shootings Are Not Caused by Mental Illness

Data from Columbia Mass Murder Database reveal psychosis and other serious psychiatric illness absent in the majority of perpetrators.

Researchers examining 82 mass murders that occurred at least partially in academic settings throughout the world found that most mass murderers and mass shooters did not have severe psychiatric illnesses. The work was done by a research team at Columbia University Irving Medical Center and the New York State Psychiatric Institute (NYSPI).

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