U.S. mass shootings 1982-2024, by prior signs of shooter's mental health issues

Mass shootings in the United States between 1982 and September 2024, by presence of prior signs of shooter's mental health issues

CharacteristicNumber of incidents
Prior signs of mental health problems 74
Unclear 24
No signs of mental health issues 17
Unknown/to be determined 36
Created with Highcharts 7.2.2Number of incidents7474242417173636Prior signs of mental health problemsUnclearNo signs of mental health issuesUnknown/to be determined
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Source

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Release date

December 2024

Region

United States

Survey time period

1982 to September 4, 2024

Supplementary notes

Since 2013, the source defines a mass shooting as any single attack in a public place with three or more fatalities, in line with the definition by the FBI. Before 2013, a mass shooting was defined as any single attack in a public place with four or more fatalities.

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