First report on mass shootings from Columbia University database

A research team at the Center of Prevention and Evaluation (COPE) at Columbia University Irving Medical Center and the New York State Psychiatric Institute, led by Drs. Gary Brucato and Ragy R. Girgis, found that, contrary to popular belief, serious mental illness was present in only 11% of all mass murderers and in only 8% of mass shooters.

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