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
Most mass murderers whose crimes occurred in school settings did not have severe psychiatric illnesses, according to a new research study by Columbia University.
According to the authors, the study is the largest analysis ever conducted on mass school shootings. The research was published online on October 27 in the“Our findings suggest that mass school shootings are different from other forms of mass murder and that they should be looked at as a distinct phenomenon,” said Dr. Girgis, director of the, a research clinic at Columbia/NYSPI specializing in the study and treatment of young adults at high risk for schizophrenia and other psychoses.
Severe mental illness was absent in the majority of perpetrators; when present, psychotic symptoms were more often associated with mass murders involving means other than firearms.
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