U.S. mass shootings 1982-2023, by prior signs of shooter's mental health issues

Mass shootings in the United States between 1982 and December 2023, by presence of prior signs of shooter's mental health issues

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Source

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Release date

December 2023

Region

United States

Survey time period

1982 to December 6, 2023

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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