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Several types of guns have been used in mass shootings in the United States, including rifles, handguns, and shotguns. A study by [[James Alan Fox]] a professor of criminology and statistics assembled <ref name=help>{{cite web |url=https://psmag.com/news/simple-facts-mass-shootings-arent-simple-72055/|last=Todd |first=Michael |title=The Simple Facts About Mass Shootings Aren't Simple at All| magazine=Pacific Standard |accessdate=August 21, 2018|date=December 23, 2013}}</ref> by [[Mother Jones (magazine)| Mother Jones]] on mass shootings from 1982-2018 showed assault weapons were used 25 percent of time in mass shootings, while semi-automatic handguns were used almost half of the time.<ref name=mother>{{cite web |url=https://www.motherjones.com/politics/2012/12/mass-shootings-mother-jones-full-data/3//|title=US Mass Shootings, 1982-2018: Data From Mother Jones’ Investigation| work=Mother Jones |accessdate=August 20, 2018|date=June 28, 2018 }}</ref><ref name=numbers>{{cite web |url=https://books.google.com/books?id=JxJ1CwAAQBAJ&printsec=frontcover&dq=mass+shootings&hl=en&sa=X&ved=0ahUKEwig0Ky4rPfcAhVq7oMKHVKDBGEQ6AEIJzAA#v=onepage&q=AR-15&f=false//|last=Schildkraut |first= Jaclyn |title=Mass Shootings: Media, Myths, and Realities: Media, Myths, and Realities| publisher=ABC-CLIO||ISBN=978-1-4408-3652-7| accessdate=August 20, 2018|date=February 22, 2016 }}</ref><ref name=cnn>{{cite web |url=https://www.mrc.org/biasalerts/criminology-professor-cnns-tapper-mass-shootings-arent-epidemic//|title=Criminology Professor to CNN's Tapper: Mass Shootings Aren't an 'Epidemic'| publisher=Media Research Center|accessdate=August 20, 2018}}</ref> Weapons with [[high capacity magazine]]s are a major trait of most spectacular shootings and have been used in more than half of all mass shootings over four decades,<ref name=Pearce>{{cite news |newspaper=[[Los Angeles Times]] |title=Gun's magazine shaped the pace of Colorado theater massacre |date=July 22, 2012 |first=Matt |last=Pearce |accessdate=July 19, 2018 |url=http://articles.latimes.com/2012/jul/22/nation/la-na-nn-theater-shooting-magazine-20120722 |quote=Much like the presence of large groups in closed spaces, large-capacity magazines are a major trait of most spectacular shootings.}}</ref><ref>{{cite news|last1=Fisher|first1=Marc|title=The AR-15: ‘America’s rifle’ or illegitimate killing machine?|url=http://wapo.st/2BZXJAh?tid=ss_mail|accessdate=May 11, 2018|work=The Washington Post|date=February 15, 2018|quote=...high-capacity magazines have been used in more than half of mass shootings over four decades, according to several studies.}}</ref> and [[AR-15]] or similar [[Semi-automatic rifle |semi-automatic rifles]] have been used in six of the ten deadliest.<ref>{{cite news|last1=Politifact staff||title=The facts on mass shootings, guns in the United States|url=http://www.politifact.com/truth-o-meter/article/2018/may/18/facts-mass-shootings-guns-united-states/|accessdate=June 11, 2018|work=Politifact|date=May 18, 2018|quote=Are AR-15s/semi-automatics involved in recent mass shootings? Yes. Semi-automatic rifles similar to the AR-15 have been used in high-profile and deadly mass shootings over the years in Aurora, Colo.; Roseburg, Ore.; San Bernadino, Calif.; Newtown, Conn.; Orlando; and in 2017, Las Vegas and Sutherland Springs, Texas.}}</ref><ref>{{cite news|last1=Pearce|first1=Matt|title=Mass shootings are getting deadlier. And the latest ones all have something new in common: The AR-15|url=http://www.latimes.com/nation/la-na-ar-15-story.html|accessdate=May 11, 2018|work=The Los Angeles Times|date=February 14, 2018|quote=in all of the latest incidents...the attackers primarily used AR-15 semiautomatic rifles.}}</ref> AR-15 rifles have come to be widely characterized as the weapon of choice for perpetrators of these crimes.<ref>{{cite news |agency=CNN |title=Why the AR-15 is the mass shooter's go-to weapon |first=Aaron |last=Smith |date=June 21, 2016 |accessdate=February 15, 2018 |url=http://money.cnn.com/2016/06/13/news/ar-15-assault-rifle/index.html |quote=The AR-15, the type of rifle used in the deadliest mass shooting in U.S. history, is the weapon of choice for mass killers.}}<br/>{{Citation|first=Aimee |last=Picchi |date=June 15, 2016 |title=America's rifle: The marketing of assault-style weapons |url=https://www.cbsnews.com/news/orlando-shooting-ar15-rifles-omar-mateen/ |publisher=CBS News |work=CBS MoneyWatch |accessdate=February 23, 2018 |quote=America has grown accustomed to military-style semi-automatic weapons such as the AR-15. It's not hard to see why: These firearms have been heavily marketed to gun owners. But at the same time, they're often the weapons of choice for mass murderers.}}<br/>{{Citation|title=Why mass shooters are increasingly using AR-15s |first1=Bart |last1=Jansen |first2=William |last2=Cummings |newspaper=USA Today |date=November 6, 2017 |accessdate=February 15, 2018 |url=https://www.usatoday.com/story/news/2017/11/06/ar-15-style-rifles-common-among-mass-shootings/838283001/ |quote=AR-15 style rifles have been the weapon of choice in many recent mass shootings, including the Texas church shooting Sunday, the Las Vegas concert last month, the Orlando nightclub last year and Sandy Hook Elementary School in 2012.}}<br/>{{Citation|title=Why AR-15-style rifles are popular among mass shooters |first=Whitney |last=Lloyd |date=February 16, 2018 |accessdate=March 2, 2018 |url=http://abcnews.go.com/US/ar-15-style-rifles-popular-mass-shooters/story?id=53111745 |agency=ABC News |quote=AR-15-style rifles have become something of a weapon of choice for mass shooters.}}<br/>{{Citation |first=Lois |last=Beckett |date=February 16, 2018 |accessdate=March 2, 2018 |title=Most Americans can buy an AR-15 rifle before they can buy beer |newspaper=The Guardian |url=https://www.theguardian.com/us-news/2018/feb/16/americans-age-to-buy-ar15-assault-rifle-mass-shootings |quote=While AR-15 style rifles have become the weapon of choice for some of America's most recent and deadly mass shootings, these military-style guns are still comparatively rarely used in everyday gun violence.}}</ref>
Several types of guns have been used in mass shootings in the United States, including rifles, handguns, and shotguns. A study by [[James Alan Fox]] a professor of criminology and statistics assembled <ref name=help>{{cite web |url=https://psmag.com/news/simple-facts-mass-shootings-arent-simple-72055/|last=Todd |first=Michael |title=The Simple Facts About Mass Shootings Aren't Simple at All| magazine=Pacific Standard |accessdate=August 21, 2018|date=December 23, 2013}}</ref> by [[Mother Jones (magazine)| Mother Jones]] on mass shootings from 1982-2018 showed assault weapons were used 25 percent of time in mass shootings, while semi-automatic handguns were used almost half of the time.<ref name=mother>{{cite web |url=https://www.motherjones.com/politics/2012/12/mass-shootings-mother-jones-full-data/3//|title=US Mass Shootings, 1982-2018: Data From Mother Jones’ Investigation| work=Mother Jones |accessdate=August 20, 2018|date=June 28, 2018 }}</ref><ref name=numbers>{{cite web |url=https://books.google.com/books?id=JxJ1CwAAQBAJ&printsec=frontcover&dq=mass+shootings&hl=en&sa=X&ved=0ahUKEwig0Ky4rPfcAhVq7oMKHVKDBGEQ6AEIJzAA#v=onepage&q=AR-15&f=false//|last=Schildkraut |first= Jaclyn |title=Mass Shootings: Media, Myths, and Realities: Media, Myths, and Realities| publisher=ABC-CLIO||ISBN=978-1-4408-3652-7| accessdate=August 20, 2018|date=February 22, 2016 }}</ref><ref name=cnn>{{cite web |url=https://www.mrc.org/biasalerts/criminology-professor-cnns-tapper-mass-shootings-arent-epidemic//|title=Criminology Professor to CNN's Tapper: Mass Shootings Aren't an 'Epidemic'| publisher=Media Research Center|accessdate=August 20, 2018}}</ref> Weapons with [[high capacity magazine]]s are a major trait of most spectacular shootings and have been used in more than half of all mass shootings over four decades,<ref name=Pearce>{{cite news |newspaper=[[Los Angeles Times]] |title=Gun's magazine shaped the pace of Colorado theater massacre |date=July 22, 2012 |first=Matt |last=Pearce |accessdate=July 19, 2018 |url=http://articles.latimes.com/2012/jul/22/nation/la-na-nn-theater-shooting-magazine-20120722 |quote=Much like the presence of large groups in closed spaces, large-capacity magazines are a major trait of most spectacular shootings.}}</ref><ref>{{cite news|last1=Fisher|first1=Marc|title=The AR-15: ‘America’s rifle’ or illegitimate killing machine?|url=http://wapo.st/2BZXJAh?tid=ss_mail|accessdate=May 11, 2018|work=The Washington Post|date=February 15, 2018|quote=...high-capacity magazines have been used in more than half of mass shootings over four decades, according to several studies.}}</ref> and [[AR-15]] or similar [[Semi-automatic rifle |semi-automatic rifles]] have been used in six of the ten deadliest.<ref>{{cite news|last1=Politifact staff||title=The facts on mass shootings, guns in the United States|url=http://www.politifact.com/truth-o-meter/article/2018/may/18/facts-mass-shootings-guns-united-states/|accessdate=June 11, 2018|work=Politifact|date=May 18, 2018|quote=Are AR-15s/semi-automatics involved in recent mass shootings? Yes. Semi-automatic rifles similar to the AR-15 have been used in high-profile and deadly mass shootings over the years in Aurora, Colo.; Roseburg, Ore.; San Bernadino, Calif.; Newtown, Conn.; Orlando; and in 2017, Las Vegas and Sutherland Springs, Texas.}}</ref><ref>{{cite news|last1=Pearce|first1=Matt|title=Mass shootings are getting deadlier. And the latest ones all have something new in common: The AR-15|url=http://www.latimes.com/nation/la-na-ar-15-story.html|accessdate=May 11, 2018|work=The Los Angeles Times|date=February 14, 2018|quote=in all of the latest incidents...the attackers primarily used AR-15 semiautomatic rifles.}}</ref> AR-15 rifles have come to be widely characterized as the weapon of choice for perpetrators of these crimes.<ref>{{cite news |agency=CNN |title=Why the AR-15 is the mass shooter's go-to weapon |first=Aaron |last=Smith |date=June 21, 2016 |accessdate=February 15, 2018 |url=http://money.cnn.com/2016/06/13/news/ar-15-assault-rifle/index.html |quote=The AR-15, the type of rifle used in the deadliest mass shooting in U.S. history, is the weapon of choice for mass killers.}}<br/>{{Citation|first=Aimee |last=Picchi |date=June 15, 2016 |title=America's rifle: The marketing of assault-style weapons |url=https://www.cbsnews.com/news/orlando-shooting-ar15-rifles-omar-mateen/ |publisher=CBS News |work=CBS MoneyWatch |accessdate=February 23, 2018 |quote=America has grown accustomed to military-style semi-automatic weapons such as the AR-15. It's not hard to see why: These firearms have been heavily marketed to gun owners. But at the same time, they're often the weapons of choice for mass murderers.}}<br/>{{Citation|title=Why mass shooters are increasingly using AR-15s |first1=Bart |last1=Jansen |first2=William |last2=Cummings |newspaper=USA Today |date=November 6, 2017 |accessdate=February 15, 2018 |url=https://www.usatoday.com/story/news/2017/11/06/ar-15-style-rifles-common-among-mass-shootings/838283001/ |quote=AR-15 style rifles have been the weapon of choice in many recent mass shootings, including the Texas church shooting Sunday, the Las Vegas concert last month, the Orlando nightclub last year and Sandy Hook Elementary School in 2012.}}<br/>{{Citation|title=Why AR-15-style rifles are popular among mass shooters |first=Whitney |last=Lloyd |date=February 16, 2018 |accessdate=March 2, 2018 |url=http://abcnews.go.com/US/ar-15-style-rifles-popular-mass-shooters/story?id=53111745 |agency=ABC News |quote=AR-15-style rifles have become something of a weapon of choice for mass shooters.}}<br/>{{Citation |first=Lois |last=Beckett |date=February 16, 2018 |accessdate=March 2, 2018 |title=Most Americans can buy an AR-15 rifle before they can buy beer |newspaper=The Guardian |url=https://www.theguardian.com/us-news/2018/feb/16/americans-age-to-buy-ar15-assault-rifle-mass-shootings |quote=While AR-15 style rifles have become the weapon of choice for some of America's most recent and deadly mass shootings, these military-style guns are still comparatively rarely used in everyday gun violence.}}</ref>


AR-15 rifles are "customizable, adaptable, reliable and accurate" and "can basically shoot as quickly as you can pull the trigger". But AR-15s are not the only rifles with these characteristics. Indeed, the AR-15 is more an open-source platform than a single weapon. For instance, the [[SIG MCX|Sig Sauer MCX]] used in the [[Orlando nightclub shooting]] more closely resembles an [[AK-47]] in some respects, but an AR [[lower receiver]] can be "upgraded" to a Sig MCX.<ref name=rolling>{{cite web |url=https://www.rollingstone.com/politics/politics-features/all-american-killer-how-the-ar-15-became-mass-shooters-weapon-of-choice-107819/|last=Dickinson |first=Tim |title=All-American Killer: How the AR-15 Became Mass Shooters’ Weapon of Choice| newspaper =[[Rolling Stone]]|accessdate=August 16, 2018|date=November 21, 2016}}</ref> Regarding the choice of AR-15 rifles in so many shootings, Lloyd Whitney of [[ABC News]] reported [[Experts |experts]] told ABC "it has nothing to do with the AR-15's lethality, but rather simple familiarity." Gun expert and former [[SWAT]] team member Dean Hazen added, "It’s a copycat thing. When they see other mass shooters use it, it reinforces the image in their mind that this is the evil tool to use.” Pete Blair, executive director of Texas State University's Advanced Law Enforcement Rapid Response Training Center—which studies mass murder—echoed Hazen's comments.<ref name=usa>{{cite web |url=https://www.usatoday.com/story/news/nation/2018/02/14/ar-15-mass-shootings/339519002/|last=Cummings |first=William |title=Why the AR-15 keeps appearing at America's deadliest mass shootings| newspaper =[[USA TODAY]]|accessdate=June 1, 2018|date=February 15, 2018|quote=..."It’s really just a perception thing," Hazen said." There are rifles that are more powerful and more dangerous than that, but they're not being used. The AK-47 variants can hold just as many rounds as the AR-15, are more reliable and use larger 7.62 mm rounds as opposed to the standard AR-15's .223 rounds.}}</ref><ref name=today>{{cite web |url=https://www.usatoday.com/story/news/2017/11/06/ar-15-style-rifles-common-among-mass-shootings/838283001|last=Jansen |first=Bart |title=Why mass shooters are increasingly using AR-15s|newspaper =[[USA TODAY]]|accessdate=June 1, 2018|date=November 8, 2017 |quote=Hazen said the AR-15 has "gotten a bad rap." He believes mass shooters generally don't know much about guns and choose the AR-15 because of the reputation it has gotten from being used in other mass shootings. }}</ref><ref name=abc>{{cite web |url=https://abcnews.go.com/US/ar-15-style-rifles-popular-mass-shooters/story?id=53111745|last=Lloyd |first=Whitney |title=Why AR-15-style rifles are popular among mass shooters| publisher=[[ABC News]]|accessdate=June 6, 2018|date=February 16, 2018|quote= Blair said... The fact that so many mass shooters are using the same gun is what sociologists call “social proof,” he added. You’re in an ambiguous situation and you don’t know what to do that. That can be looking at what silverware other people use at a fancy dinner party and copying them, or it can be using the same type of weapon other shooters have used if you’re planning a mass shooting. }}</ref>
Regarding the choice of AR-15 rifles in so many shootings, Lloyd Whitney of [[ABC News]] reported [[Experts |experts]] told ABC "it has nothing to do with the AR-15's lethality, but rather simple familiarity." Gun expert and former [[SWAT]] team member Dean Hazen added, "It’s a copycat thing. When they see other mass shooters use it, it reinforces the image in their mind that this is the evil tool to use.” Pete Blair, executive director of Texas State University's Advanced Law Enforcement Rapid Response Training Center—which studies mass murder—echoed Hazen's comments.<ref name=usa>{{cite web |url=https://www.usatoday.com/story/news/nation/2018/02/14/ar-15-mass-shootings/339519002/|last=Cummings |first=William |title=Why the AR-15 keeps appearing at America's deadliest mass shootings| newspaper =[[USA TODAY]]|accessdate=June 1, 2018|date=February 15, 2018|quote=..."It’s really just a perception thing," Hazen said." There are rifles that are more powerful and more dangerous than that, but they're not being used. The AK-47 variants can hold just as many rounds as the AR-15, are more reliable and use larger 7.62 mm rounds as opposed to the standard AR-15's .223 rounds.}}</ref><ref name=today>{{cite web |url=https://www.usatoday.com/story/news/2017/11/06/ar-15-style-rifles-common-among-mass-shootings/838283001|last=Jansen |first=Bart |title=Why mass shooters are increasingly using AR-15s|newspaper =[[USA TODAY]]|accessdate=June 1, 2018|date=November 8, 2017 |quote=Hazen said the AR-15 has "gotten a bad rap." He believes mass shooters generally don't know much about guns and choose the AR-15 because of the reputation it has gotten from being used in other mass shootings. }}</ref><ref name=abc>{{cite web |url=https://abcnews.go.com/US/ar-15-style-rifles-popular-mass-shooters/story?id=53111745|last=Lloyd |first=Whitney |title=Why AR-15-style rifles are popular among mass shooters| publisher=[[ABC News]]|accessdate=June 6, 2018|date=February 16, 2018|quote= Blair said... The fact that so many mass shooters are using the same gun is what sociologists call “social proof,” he added. You’re in an ambiguous situation and you don’t know what to do that. That can be looking at what silverware other people use at a fancy dinner party and copying them, or it can be using the same type of weapon other shooters have used if you’re planning a mass shooting. }}</ref>


==Deadliest mass shootings since 1949==
==Deadliest mass shootings since 1949==

Revision as of 13:54, 27 August 2018

Total deaths in US mass shootings from 1982 to 2017, according to Mother Jones.[1]
Locations of US mass shootings in 2015, according to Shooting Tracker.

There is no fixed definition of a mass shooting,[2] but a common definition is an act of violence — excluding gang killings, domestic violence, or terrorist acts sponsored by an organization — in which a gunman kills at least four victims. Using this definition, one study found that nearly one-third of the world's public mass shootings between 1966 and 2012 (90 of 292 incidents) occurred in the United States.[3][4] Using the same definition, Gun Violence Archive records 152 mass shootings in the United States between 1967 and May 2018, averaging eight fatalities per incident when the perpetrator's death is included.[5]

The United States has had more mass shootings than any other country.[6][3][7][8][9] The overwhelming majority of perpetrators are males and act alone,[10] and they generally either commit suicide or are restrained or killed by law enforcement officers or civilians.[11]

Definition

There is no fixed definition of a mass shooting in the United States.[2] The Investigative Assistance for Violent Crimes Act of 2012, signed into law by Congress in January 2013, defines a "mass killing" as one resulting in at least 3 victims, excluding the perpetrator.[12][2][13][14] In 2015, the Congressional Research Service defined a mass shooting as "a multiple homicide incident in which four or more victims are murdered with firearms, within one event, and in one or more locations in close proximity".[15] A broader definition, as used by the Gun Violence Archive, is that of "4 or more shot or killed, not including the shooter".[16] This definition, of four people shot regardless of whether or not that results in injury or death, is often used by the press and non-profit organizations.[17][18][19][20][21]

Frequency

Memorial at the Welcome to Fabulous Las Vegas sign following the 2017 Las Vegas shooting, which resulted in 59 deaths and 851 non-fatal injuries.

Studies indicate that the rate at which public mass shootings occur has tripled since 2011. Between 1982 and 2011, a mass shooting occurred roughly once every 200 days. However, between 2011 and 2014 that rate has accelerated greatly with at least one mass shooting occurring every 64 days in the United States.[22]

In recent years, the number of public mass shootings has increased substantially, although there has been an approximately 50% decrease in firearm homicides in the nation overall since 1993. The decrease in firearm homicides has been attributed to better policing, a better economy and environmental factors such as the removal of lead from gasoline.[23] However, this does not account for an increase in firearm injuries or suicides, nor explain the increase in mass shootings.

Differing sources

A comprehensive report by USA Today tracked all mass killings from 2006 through 2017 in which the perpetrator willfully killed 4 or more people. For mass killings by firearm for instance, it found 271 incidents with a total of 1,358 victims.[24] Mother Jones listed seven mass shootings, defined as indiscriminate rampages in public places resulting in four or more victims killed,[25] in the U.S. for 2015.[26] An analysis by Michael Bloomberg's gun violence prevention group, Everytown for Gun Safety, identified 110 mass shootings, defined as shootings in which at least four people were murdered with a firearm, between January 2009 and July 2014; at least 57% were related to domestic or family violence.[27][28]

Other media outlets have reported that hundreds of mass shootings take place in the United States in a single calendar year, citing a crowd-funded website known as Shooting Tracker which defines a mass shooting as having four or more people injured or killed.[19] In December 2015, The Washington Post reported that there had been 355 mass shootings in the United States so far that year.[29] In August 2015, The Washington Post reported that the United States was averaging one mass shooting per day.[30] An earlier report had indicated that in 2015 alone, there had been 294 mass shootings that killed or injured 1,464 people.[31] Shooting Tracker and Mass Shooting Tracker, the two sites that the media have been citing, have been criticized for using a broader criteria – counting four victims injured as a mass shooting – thus producing much higher figures.[32][33]

Contributing factors

Several possible factors may work together to create a fertile environment for mass murder in the United States.[34] Most commonly suggested include:

  1. Higher accessibility and ownership of guns.[34][3][8] The US has the highest per-capita gun ownership in the world with 88.8 firearms per 100 people; the second highest is Yemen with 54.8 firearms per 100 people.[34]
  2. Mental illness[35] and its treatment (or the lack thereof) with psychiatric drugs.[36] This is controversial.[37][38] Many of the mass shooters in the U.S. suffered from mental illness, but the estimated number of mental illness cases has not increased as significantly as the number of mass shootings.[3]
  3. The desire to seek revenge for a long history of being bullied.[39]
  4. Desire for fame and notoriety.[34][3]
  5. The copycat phenomenon.[3]
  6. Failure of government background checks due to incomplete databases and/or staff shortages.[40][41]
  7. The widespread chronic gap between people's expectations for themselves and their actual achievement,[34] and individualistic culture.[42]

Weapons used

Several types of guns have been used in mass shootings in the United States, including rifles, handguns, and shotguns. A study by James Alan Fox a professor of criminology and statistics assembled [43] by Mother Jones on mass shootings from 1982-2018 showed assault weapons were used 25 percent of time in mass shootings, while semi-automatic handguns were used almost half of the time.[44][45][46] Weapons with high capacity magazines are a major trait of most spectacular shootings and have been used in more than half of all mass shootings over four decades,[47][48] and AR-15 or similar semi-automatic rifles have been used in six of the ten deadliest.[49][50] AR-15 rifles have come to be widely characterized as the weapon of choice for perpetrators of these crimes.[51]

Regarding the choice of AR-15 rifles in so many shootings, Lloyd Whitney of ABC News reported experts told ABC "it has nothing to do with the AR-15's lethality, but rather simple familiarity." Gun expert and former SWAT team member Dean Hazen added, "It’s a copycat thing. When they see other mass shooters use it, it reinforces the image in their mind that this is the evil tool to use.” Pete Blair, executive director of Texas State University's Advanced Law Enforcement Rapid Response Training Center—which studies mass murder—echoed Hazen's comments.[52][53][54]

Deadliest mass shootings since 1949

The following mass shootings are the deadliest to have occurred in modern U.S. history (1949 to present). Only incidents with ten or more fatalities are included.[55]

† Was previously the deadliest mass shooting
Incident Year Deaths Injuries Type of firearm(s) used Ref(s)
1 Las Vegas shooting 2017 59 (inc. the perp.) 851 (422 from gunfire) Semi-automatic rifles and pistols [56][57]
2 Orlando nightclub shooting † 2016 50 (inc. the perp.) 53 Semi-automatic rifle and pistol [56][57]
3 Virginia Tech shooting † 2007 33 (inc. the perp.) 23 Semi-automatic pistols [56]
4 Sandy Hook Elementary School shooting 2012 28 (inc. the perp.) 2 Semi-automatic rifle and pistol [56]
5 Sutherland Springs church shooting 2017 27 (inc. the perp.)[fn 1] 20 Semi-automatic rifle [58][57]
6 Luby's shooting † 1991 24 (inc. the perp.) 27 Semi-automatic pistols [56]
7 San Ysidro McDonald's massacre † 1984 23 (inc. the perp.)[fn 1] 19 Semi-automatic pistol, submachine gun and shotgun [56]
8 University of Texas tower shooting † 1966 18 (inc. the perp.)[fn 1] 31 Rifles, revolver, pistols and shotgun [56]
9 Stoneman Douglas High School shooting 2018 17 17 Semi-automatic rifle [59]
10 San Bernardino attack 2015 16 (inc. both perps.) 24 Semi-automatic rifles [56][57]
11 Edmond post office shooting 1986 15 (inc. the perp.) 6 Semi-automatic pistols [56]
Columbine High School massacre 1999 15 (inc. both perps.) 24 Shotguns, semi-automatic rifle, bombs, semi-automatic pistol [60][self-published source?]
13 Binghamton shootings 2009 14 (inc. the perp.) 4 Semi-automatic pistols [60][self-published source?]
Fort Hood shooting 2009 14 [fn 1] 33 (inc. the perp.) Semi-automatic pistol and revolver [60][self-published source?]
15 Camden shootings † 1949 13 3 Semi-automatic pistol [61][62]
Wilkes-Barre shootings 1982 13 1 Semi-automatic rifle [63][64][65]
Wah Mee massacre 1983 13 1 Multiple types of firearms [66]
Washington Navy Yard shooting 2013 13 (inc. the perp.) 8 Semi-automatic pistol and shotgun [60][self-published source?]
19 Aurora shooting 2012 12 70 Semi-automatic rifle, pistol, shotgun [60][self-published source?][57]
20 Easter Sunday massacre 1975 11 0 Semi-automatic pistols and revolver [67]
Geneva County massacre 2009 11 (inc. the perp.) 6 Semi-automatic rifles, revolver, and shotgun [60][self-published source?]
22 Palm Sunday massacre 1984 10 0 Semi-automatic pistols [68]
GMAC shootings 1990 10 (inc. the perp.) 6 Semi-automatic rifle [56]
Atlanta shootings 1999 10 (inc. the perp.) 13 Semi-automatic pistols and revolver [56]
Red Lake shootings 2005 10 (inc. the perp.) 5 Semi-automatic pistols and shotgun [60][self-published source?]
Umpqua Community College shooting 2015 10 (inc. the perp.) 8 Semi-automatic pistols, Rifle (Not used) and revolver [60][self-published source?]
Santa Fe High School shooting 2018 10 14 Shotgun, bombs, and a revolver. [69]

See also

Notes

  1. ^ a b c d The fatality total includes an unborn child.

References

  1. ^ "US Mass Shootings, 1982–2017: Data From Mother Jones' Investigation".
  2. ^ a b c Greenberg, Jacobson & Valverde, Jon, Louis & Miriam (February 14, 2018). "What we know about mass shootings". Politifact. 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.{{cite web}}: CS1 maint: multiple names: authors list (link)
  3. ^ a b c d e f Christensen, Jen (October 5, 2017). "Why the US has the most mass shootings". CNN. Retrieved November 6, 2017.
  4. ^ Lankford, Adam (2016). Public Mass Shooters and Firearms: A Cross-National Study of 171 Countries. Violence and Victims, Volume 31, Number 2. Retrieved: May 3, 2018.
  5. ^ Berkowitz, Bonnie; Gamio, Lazaro; Lu, Denise; Uhrmacher, Kevin; Lindeman, Todd (October 5, 2017). "50 years of U.S. mass shootings: The victims, sites, killers and weapons". Washington Post. Retrieved November 5, 2017.
  6. ^ U.S. Leads World in Mass Shootings. The Wall Street Journal. Retrieved: October 2, 2017.
  7. ^ Why the U.S. is No. 1 – in mass shootings. Los Angeles Times. Retrieved: October 2, 2017.
  8. ^ a b The United States Has Had More Mass Shootings Than Any Other Country. Mother Jones. Retrieved: October 2, 2017.
  9. ^ https://www.cnn.com/2017/10/03/americas/us-gun-statistics/index.html
  10. ^ Victor, Daniel (February 17, 2018). Mass Shooters Are All Different. Except for One Thing: Most Are Men. The New York Times. Retrieved: April 10, 2018.
  11. ^ Blair, John Pete; Schweit, Katherine W. (2014), A Study of Active Shooter Incidents, 2000–2013 (PDF), Washington DC: Texas State University and Federal Bureau of Investigation
  12. ^ "H.R. 2076 (112th): Investigative Assistance for Violent Crimes Act of 2012". govtrack.us. United States Congress. Retrieved February 20, 2018. (I)the term mass killings means 3 or more killings in a single incident;
  13. ^ Ingraham, Christopher (December 3, 2015). "What makes a 'mass shooting' in America". Washington Post. Retrieved November 5, 2017. But starting in 2013, federal statutes defined "mass killing" as three or more people killed, regardless of weapons.
  14. ^ Follman, Mark. "What Exactly Is A Mass Shooting". Mother Jones. Retrieved August 9, 2015. In January 2013, a mandate for federal investigation of mass shootings authorized by President Barack Obama lowered that baseline to three or more victims killed.
  15. ^ Krouse, William J.; Richardson, Daniel J. (July 30, 2015). "Mass Murder with Firearms: Incidents and Victims, 1999-2013" (pdf). FAS.org. Congressional Research Service. Retrieved February 21, 2018.
  16. ^ "General Methodology". Gun Violence Archive. Retrieved February 21, 2018.
  17. ^ Nichols, Chris (October 4, 2017). "How is a 'mass shooting' defined?". PolitiFact California. Retrieved February 21, 2018.
  18. ^ Christensen, Jen (August 28, 2015). "Why the U.S. has the most mass shootings". CNN.
  19. ^ a b "About the Mass Shooting Tracker". Mass Shooting Tracker. Retrieved June 13, 2016.
  20. ^ "Orlando club shootings: Full fury of gun battle emerges". - BBC News. June 13, 2016. Retrieved June 13, 2016. Cites Mass Shooting Tracker
  21. ^ Axelrod, Jim (November 6, 2017). "Are Americans becoming "numb" to mass shootings?". CBS Evening News. Retrieved February 21, 2018.
  22. ^ "Rate of mass shootings has tripled since 2011, new research from Harvard shows". Mother Jones. Retrieved December 13, 2017.
  23. ^ Ehrenfreund, Max (December 3, 2015). "We've had a massive decline in gun violence in the United States. Here's why". Washington Post. ISSN 0190-8286. Retrieved December 13, 2017.
  24. ^ "Behind the Bloodshed". USA Today. Retrieved December 3, 2015.
  25. ^ Mark Follman; Gavin Aronsen; Deanna Pan (June 12, 2016). "A Guide to Mass Shootings in America". Motherjones.com. Retrieved June 13, 2016.
  26. ^ Mark Follman; Gavin Aronsen; Deanna Pan. "US Mass Shootings, 1982–2016: Data From Mother Jones' Investigation". Motherjones.com. Retrieved June 13, 2016. Original date December 28, 2012 ; list updated every 5 minutes. Figures for years 2011–2015: 3, 7, 5, 4, 7.
  27. ^ Melissa Jeltsen (July 18, 2014). "Mass Shooting Analysis Finds Strong Domestic Violence Connection". The Huffington Post. Retrieved June 13, 2016.
  28. ^ "Analysis of Mass Shootings". Everytownresearch.org. August 20, 2015. Retrieved June 13, 2016. This analysis has later figures than reported in the article
  29. ^ "The San Bernardino shooting is the second mass shooting today and the 355th this year". Washington Post. December 2, 2015. Retrieved December 16, 2015.
  30. ^ Ingraham, Christopher (August 26, 2015). "We're now averaging more than one mass shooting per day in 2015". Washington Post. Retrieved September 6, 2015.
  31. ^ "More than one mass shooting happens per day in the U.S., data shows". PBS NewsHour. Retrieved October 8, 2015.
  32. ^ Follman, Mark (December 3, 2015). "How Many Mass Shootings Are There, Really?". New York Times. Retrieved December 6, 2015.
  33. ^ Stuart, Elizabeth (December 7, 2015). "Number of U.S. Mass Shootings Greatly Exaggerated in Media, Acclaimed Researcher States". Phoenix New Times. Retrieved December 10, 2015.
  34. ^ a b c d e Healy, Melissa (August 24, 2015). "Why the U.S. is No. 1 – in mass shootings". LA Times. Retrieved November 6, 2017.
  35. ^ "The real mental health issue behind gun violence". CNN. January 25, 2016. Retrieved November 7, 2017.
  36. ^ "Psychiatric Drugs and Violence: A Review of FDA Data Finds A Link". Psychology Today. Retrieved May 30, 2018.
  37. ^ Campbell, Holly (December 2, 2015). "Inside the mind of a mass murderer". WANE.com. Retrieved November 9, 2017.
  38. ^ Fox, James Alan (January 16, 2011). "The real causes of mass murder". Boston.com. Retrieved November 9, 2017.
  39. ^ Burgess, Ann Wolbert, Christina Garbarino, and Mary I. Carlson. "Pathological teasing and bullying turned deadly: Shooters and suicide." Victims and Offenders 1.1 (2006): 1-14.
  40. ^ Johnson, Kevin. "Texas Church Shooting Background Check Failure." USA Today. November 9, 2017. Accessed November 17, 2017. https://www.usatoday.com/story/news/politics/2017/11/09/texas-church-shooting-background-check-breakdown-highlights-federal-gun-record-problems/847947001/.
  41. ^ Barrett, Devlin. "FBI's Gun Background Check Database Missing Records." Chicago Tribune. November 10, 2017. Accessed November 17, 2017. http://www.chicagotribune.com/news/nationworld/ct-fbi-gun-background-check-system-missing-records-20171110-story.html.
  42. ^ Dorell, Oren (December 18, 2012). "In Europe, fewer mass killings due to culture not guns". USA Today. Retrieved August 11, 2015.
  43. ^ Todd, Michael (December 23, 2013). "The Simple Facts About Mass Shootings Aren't Simple at All". Pacific Standard. Retrieved August 21, 2018.
  44. ^ "US Mass Shootings, 1982-2018: Data From Mother Jones' Investigation". Mother Jones. June 28, 2018. Retrieved August 20, 2018.
  45. ^ Schildkraut, Jaclyn (February 22, 2016). "Mass Shootings: Media, Myths, and Realities: Media, Myths, and Realities". ABC-CLIO. ISBN 978-1-4408-3652-7. Retrieved August 20, 2018. {{cite web}}: Cite has empty unknown parameter: |1= (help)
  46. ^ "Criminology Professor to CNN's Tapper: Mass Shootings Aren't an 'Epidemic'". Media Research Center. Retrieved August 20, 2018.
  47. ^ Pearce, Matt (July 22, 2012). "Gun's magazine shaped the pace of Colorado theater massacre". Los Angeles Times. Retrieved July 19, 2018. Much like the presence of large groups in closed spaces, large-capacity magazines are a major trait of most spectacular shootings.
  48. ^ Fisher, Marc (February 15, 2018). "The AR-15: 'America's rifle' or illegitimate killing machine?". The Washington Post. Retrieved May 11, 2018. ...high-capacity magazines have been used in more than half of mass shootings over four decades, according to several studies.
  49. ^ Politifact staff (May 18, 2018). "The facts on mass shootings, guns in the United States". Politifact. Retrieved June 11, 2018. Are AR-15s/semi-automatics involved in recent mass shootings? Yes. Semi-automatic rifles similar to the AR-15 have been used in high-profile and deadly mass shootings over the years in Aurora, Colo.; Roseburg, Ore.; San Bernadino, Calif.; Newtown, Conn.; Orlando; and in 2017, Las Vegas and Sutherland Springs, Texas. {{cite news}}: Cite has empty unknown parameter: |1= (help)
  50. ^ Pearce, Matt (February 14, 2018). "Mass shootings are getting deadlier. And the latest ones all have something new in common: The AR-15". The Los Angeles Times. Retrieved May 11, 2018. in all of the latest incidents...the attackers primarily used AR-15 semiautomatic rifles.
  51. ^ Smith, Aaron (June 21, 2016). "Why the AR-15 is the mass shooter's go-to weapon". CNN. Retrieved February 15, 2018. The AR-15, the type of rifle used in the deadliest mass shooting in U.S. history, is the weapon of choice for mass killers.
    Picchi, Aimee (June 15, 2016), "America's rifle: The marketing of assault-style weapons", CBS MoneyWatch, CBS News, retrieved February 23, 2018, America has grown accustomed to military-style semi-automatic weapons such as the AR-15. It's not hard to see why: These firearms have been heavily marketed to gun owners. But at the same time, they're often the weapons of choice for mass murderers.
    Jansen, Bart; Cummings, William (November 6, 2017), "Why mass shooters are increasingly using AR-15s", USA Today, retrieved February 15, 2018, AR-15 style rifles have been the weapon of choice in many recent mass shootings, including the Texas church shooting Sunday, the Las Vegas concert last month, the Orlando nightclub last year and Sandy Hook Elementary School in 2012.
    Lloyd, Whitney (February 16, 2018), Why AR-15-style rifles are popular among mass shooters, retrieved March 2, 2018, AR-15-style rifles have become something of a weapon of choice for mass shooters. {{citation}}: Unknown parameter |agency= ignored (help)
    Beckett, Lois (February 16, 2018), "Most Americans can buy an AR-15 rifle before they can buy beer", The Guardian, retrieved March 2, 2018, While AR-15 style rifles have become the weapon of choice for some of America's most recent and deadly mass shootings, these military-style guns are still comparatively rarely used in everyday gun violence.
  52. ^ Cummings, William (February 15, 2018). "Why the AR-15 keeps appearing at America's deadliest mass shootings". USA TODAY. Retrieved June 1, 2018. ..."It's really just a perception thing," Hazen said." There are rifles that are more powerful and more dangerous than that, but they're not being used. The AK-47 variants can hold just as many rounds as the AR-15, are more reliable and use larger 7.62 mm rounds as opposed to the standard AR-15's .223 rounds.
  53. ^ Jansen, Bart (November 8, 2017). "Why mass shooters are increasingly using AR-15s". USA TODAY. Retrieved June 1, 2018. Hazen said the AR-15 has "gotten a bad rap." He believes mass shooters generally don't know much about guns and choose the AR-15 because of the reputation it has gotten from being used in other mass shootings.
  54. ^ Lloyd, Whitney (February 16, 2018). "Why AR-15-style rifles are popular among mass shooters". ABC News. Retrieved June 6, 2018. Blair said... The fact that so many mass shooters are using the same gun is what sociologists call "social proof," he added. You're in an ambiguous situation and you don't know what to do that. That can be looking at what silverware other people use at a fancy dinner party and copying them, or it can be using the same type of weapon other shooters have used if you're planning a mass shooting.
  55. ^ "Deadliest Mass Shootings in Modern US History Fast Facts". CNN. April 1, 2018. Retrieved April 6, 2018.
  56. ^ a b c d e f g h i j k "Deadliest Mass Shootings in Modern US History Fast Facts". CNN. Retrieved November 5, 2017.
  57. ^ a b c d e "Texas gunman used same rifle as Las Vegas, Newtown mass shooters". NY Daily News. Retrieved November 7, 2017.
  58. ^ Carissimo, Justin (November 6, 2017). "26 dead in shooting at church in Sutherland Springs, Texas". CBS News. Retrieved November 6, 2017.
  59. ^ Emanuella Grinberg; Eric Levensen (February 14, 2018). "At least 17 dead in Florida school shooting, law enforcement says". CNN. Retrieved February 14, 2018.
  60. ^ a b c d e f g h "Terrorist attacks and related incidents in the United States". johnstonarchive.net. Retrieved November 6, 2017.
  61. ^ Berger, Meyer (September 7, 1949). "Veteran Kills 12 in Mad Rampage on Camden Street". The New York Times. Retrieved July 6, 2018. Howard B. Unruh, 28 years old, a mild, soft-spoken veteran of many armored artillery battles in Italy, France, Austria, Belgium and Germany, killed twelve persons with a war souvenir Luger pistol in his home block in East Camden this morning. He wounded four others.
  62. ^ Sauer, Patrick (October 14, 2015). "The Story of the First Mass Murder in U.S. History". Smithsonian Magazine. Smithsonian Institution. He went into his apartment, uncased his German Luger P08, a 9mm pistol he'd purchased at a sporting goods store in Philadelphia for $37.50, and secured it with two clips and 33 loose cartridges.
  63. ^ 99-9005 (United States Court of Appeals for the Third Circuit October 31, 2001) ("On September 25, 1982 in Wilkes-Barre, Pennsylvania, Banks shot fourteen people with a Colt AR 15 semi-automatic rifle, killing thirteen and wounding one.").
  64. ^ 513 Pa. 318 (Supreme Court of Pennsylvania 1987) ("In the space of about one hour, appellant shot fourteen people with a Colt AR-15 semi-automatic rifle, killing thirteen and wounding one.").
  65. ^ Dietz, P. E. (1986). "Mass, serial and sensational homicides". Bulletin of the New York Academy of Medicine. 62 (5): 477–491. PMC 1629267. He had purchased equipment and materials of the kind advertised and promoted in these magazines, including a Colt AR-15 semi-automatic rifle...
  66. ^ Kang, Martha. "Wah Mee Massacre prisoner closer to release". Komo News.com. Retrieved March 27, 2018.
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  69. ^ Andone, Dakin; Allen, Keith; Almasy, Steve. "Alleged shooter at Texas high school spared people he liked, court document says". CNN. Retrieved May 25, 2018.
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