Mass shootings in the United States

Mass shootings are events where there are many victims of firearm-related violence.^[1]^[2]^[3] There is no exact definition for a "mass shooting". One definition is that a mass shooting is an act of public firearm violence in which a shooter kills at least four victims. Gang killings, domestic violence, or terrorist acts by an organization are not included. With this definition, one study found that about one-third of the world's public mass shootings between 1966 and 2012 (90 of 292 events) happened in the United States.^[4] The Washington Post recorded 163 mass shootings in the United States between 1967 and June 2019.^[5]

↑ Borchers, Callum (October 4, 2017). "The squishy definition of 'mass shooting' complicates media coverage". The Washington Post. Retrieved August 26, 2018. ...'mass shooting' is a term without a universally-accepted definition.
↑ Bjelopera, Jerome (March 18, 2013). "Public Mass Shootings in the United States" (PDF). Congressional Research Service. Archived from the original (PDF) on September 9, 2013. Retrieved August 26, 2018. There is no broadly agreed-to, specific conceptualization of this issue, so this report uses its own definition for public mass shootings.
↑ Greenberg, Jon; Jacobson, Louis; Valverde, Miriam (February 14, 2018). "What we know about mass shootings". Tampa Bay Times. Retrieved February 20, 2018. As noted above, there is no widely accepted definition of mass shootings. People use either broad or restrictive definitions of mass shootings to reinforce their stance on gun control. After the 2012 Sandy Hook school shooting, Congress defined "mass killings" as three or more homicides in a single incident. The definition was intended to clarify when the U.S. Attorney General could assist state and local authorities in investigations of violent acts and shootings in places of public use.
↑ Lankford, Adam (2016). "Public Mass Shooters and Firearms: A Cross-National Study of 171 Countries". Violence and Victims. 31 (2): 187–99. doi:10.1891/0886-6708.VV-D-15-00093. PMID 26822013. S2CID 207266615.
↑ Berkowitz, Bonnie; Gamio, Lazaro; Lu, Denise; Uhrmacher, Kevin; Lindeman, Todd. "The terrible numbers that grow with each mass shooting". The Washington Post. Retrieved November 5, 2017.

[1] Borchers, Callum (October 4, 2017). "The squishy definition of 'mass shooting' complicates media coverage". The Washington Post. Retrieved August 26, 2018. ...'mass shooting' is a term without a universally-accepted definition.

[:02-2] Bjelopera, Jerome (March 18, 2013). "Public Mass Shootings in the United States" (PDF). Congressional Research Service. Archived from the original (PDF) on September 9, 2013. Retrieved August 26, 2018. There is no broadly agreed-to, specific conceptualization of this issue, so this report uses its own definition for public mass shootings.

[politifact2018-3] Greenberg, Jon; Jacobson, Louis; Valverde, Miriam (February 14, 2018). "What we know about mass shootings". Tampa Bay Times. Retrieved February 20, 2018. As noted above, there is no widely accepted definition of mass shootings. People use either broad or restrictive definitions of mass shootings to reinforce their stance on gun control. After the 2012 Sandy Hook school shooting, Congress defined "mass killings" as three or more homicides in a single incident. The definition was intended to clarify when the U.S. Attorney General could assist state and local authorities in investigations of violent acts and shootings in places of public use.

[4] Lankford, Adam (2016). "Public Mass Shooters and Firearms: A Cross-National Study of 171 Countries". Violence and Victims. 31 (2): 187–99. doi:10.1891/0886-6708.VV-D-15-00093. PMID 26822013. S2CID 207266615.

[50years-5] Berkowitz, Bonnie; Gamio, Lazaro; Lu, Denise; Uhrmacher, Kevin; Lindeman, Todd. "The terrible numbers that grow with each mass shooting". The Washington Post. Retrieved November 5, 2017.

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