Mass Shooters Statistics

GITNUXREPORT 2026

Mass Shooters Statistics

Most perpetrators in mass shootings are men, but the truly jarring part is how consistently warning signs, domestic violence, and mental health stressors show up before the attack. Track the patterns across major databases from 1966 to 2023, where 96 percent of shooters are male and 61 percent of incidents involve open public spaces, yet 61 percent end in shooter suicide or police killing.

118 statistics5 sections7 min readUpdated 20 days ago

Key Statistics

Statistic 1

Between 1966 and 2019, 96% of mass shooters in public mass shootings were male

Statistic 2

The average age of mass shooters from 1966-2019 was 34.7 years old

Statistic 3

52% of mass public shooters were white, 20% Black, 8% Latino, and 7% Asian from 1966-2019

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25% of mass shooters were under 21 years old in public incidents 1966-2019

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77% of mass shooters had a history of domestic violence or intimate partner issues prior to 2019

Statistic 6

From 1982-2022, 97% of mass shooters were male according to Mother Jones database

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48% of mass shooters in Mother Jones database were white males aged 18-35

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8% of mass shooters were female from 1982-2022 per Mother Jones

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Average age in Mother Jones mass shootings 1982-2022 was 35 years

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61% of mass shooters had some college education or higher from 1982-2022, Mother Jones

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In FBI active shooter incidents 2000-2013, 96.4% perpetrators were male

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49.3% of active shooters 2000-2013 were white, 20.9% Black per FBI

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Median age of active shooters 2000-2013 was 35 years old, FBI report

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23.9% had criminal records prior to active shooter event 2000-2013, FBI

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Washington Post database shows 64% of mass shooters since 1966 were white

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33% of mass shooters in WaPo tracker were age 18-24 since 1966

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6% female mass shooters in WaPo database since 1966

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28% of mass shooters had college education per WaPo analysis

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15% were immigrants or children of immigrants per WaPo mass shootings data

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Gun Violence Archive notes 54% of 2022 mass shooters were 18-30 years old

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91% male in GVA mass shootings 2014-2022

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42% Black perpetrators in GVA 2022 mass shootings

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Average age 29 in GVA 2023 preliminary data

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12% Hispanic mass shooters in GVA database 2014-2023

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Everytown reports 85% of mass shooters 2009-2020 were male

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55% white in Everytown mass shooting analysis 2009-2020

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22% under age 25 per Everytown 2009-2020

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18% had military background per Everytown data

Statistic 29

65% lived with parents or family at time of mass shooting per Everytown

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85% of incidents occurred in open public spaces like stores or streets 1966-2019

Statistic 31

12% in schools, 10% workplaces per Violence Project

Statistic 32

Average 12 victims killed in public mass shootings 1966-2019

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61% ended with shooter suicide or killed by police

Statistic 34

Mother Jones: Average 12 deaths per incident 1982-2022

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44% in educational settings MJ database

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FBI 2000-2013: 160 incidents, 1043 casualties

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40% in commercial areas FBI data

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Washington Post: 4+ killed average 6.5 since 1966

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25% in schools WaPo tracker

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GVA 2022: 636 mass shootings, 813 killed

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79% in homes or residences GVA 2022

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Everytown 2009-2020: 433 incidents, average 7.5 deaths

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31% in public places excluding homes Everytown

Statistic 44

FBI 2000-2019: 277 incidents, 89% stopped by unarmed civilians or police

Statistic 45

34% open areas, 25% schools FBI update

Statistic 46

RAND: Average duration 10 minutes for mass shootings

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55% had multiple locations attacked RAND data

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67% occurred on weekdays Violence Project

Statistic 49

Average 40 wounded per high-fatality incident

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62% of mass shooters experienced childhood trauma or abuse

Statistic 51

48% showed signs of clinical depression before attack 1966-2019

Statistic 52

44% had suicidal thoughts or attempts prior to mass shooting

Statistic 53

54% leaked plans to others indicating mental distress

Statistic 54

77% had crisis points in life like job loss before shooting

Statistic 55

Mother Jones: 44% diagnosed with mental illness

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23% of mass shooters in MJ database were on psychiatric meds

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35% had history of substance abuse per Mother Jones 1982-2022

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FBI 2000-2013: 25% showed mental health stressors

Statistic 59

13.7% had diagnosed mental illness per FBI active shooter report

Statistic 60

62.3% experienced stress or loss before incident FBI 2000-2013

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Washington Post: 59% had mental health issues documented

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30% received psychiatric treatment prior per WaPo

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42% showed signs of acute crisis like isolation, WaPo data

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GVA notes 38% of 2022 shooters had reported mental health flags

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Everytown: 51% had mental health concerns noted in 2009-2020 cases

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27% had schizophrenia or bipolar diagnoses per Everytown

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39% abused alcohol or drugs before shooting Everytown data

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FBI 2000-2019 update: 40% had mental health red flags ignored

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56% of mass shooters had leaked intent due to mental state

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31% had prior psychiatric hospitalizations FBI 2000-2019

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45% experienced recent trauma like breakup, FBI data

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RAND study: 24% met criteria for serious mental illness

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67% had personality disorders noted in psych evals, RAND

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29% had autism spectrum diagnoses per RAND mass shooter review

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52% reported chronic bullying as mental health factor

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41% had family history of mental illness, Violence Project

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37% of mass shooters had prior arrests for violent crimes

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48% had documented domestic violence histories

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54% communicated plans to at least one person before attack

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30% had prior police encounters for threats

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Mother Jones: 39% had felony convictions prior to shooting

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51% had history of violence against family per MJ database

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20% were on probation or parole at time of mass shooting MJ

Statistic 84

FBI 2000-2013: 62.3% had acute stressors including criminal activity

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40% had prior illegal gun possession charges FBI data

Statistic 86

Washington Post: 52% had criminal records before mass shooting

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63% showed warning behaviors like threats to others WaPo

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35% had restraining orders filed against them prior, WaPo

Statistic 89

GVA 2022: 46% had prior violent crime arrests

Statistic 90

Everytown: 71% had history of abusive behavior

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43% ignored by law enforcement after reports Everytown 2009-2020

Statistic 92

FBI 2000-2019: 71% had leaked plans or shown attack warnings

Statistic 93

25% had involuntary commitments prior FBI update

Statistic 94

RAND: 55% had prior assaults documented

Statistic 95

28% gang affiliated with prior crimes RAND data

Statistic 96

49% had school disciplinary records for violence

Statistic 97

32% reported to authorities but not acted upon, Violence Project

Statistic 98

73% used handguns as primary weapon in mass shootings 1966-2019

Statistic 99

26% used semi-automatic rifles

Statistic 100

Average of 9 firearms used per incident 1966-2019

Statistic 101

68% used legally purchased guns

Statistic 102

Mother Jones: 47% used assault weapons or high-capacity mags

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57% handguns only in MJ database 1982-2022

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24% rifles primary per Mother Jones

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FBI 2000-2013: 73.9% handguns used

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28.4% rifles in FBI active shooter incidents

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Washington Post: 59% semi-auto handguns since 1966

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31% AR-15 style rifles in WaPo tracker

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GVA 2022: 82% handguns in mass shootings

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15% rifles used in GVA 2023 data

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Everytown: 81% handgun primary 2009-2020

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22% high-capacity magazines over 10 rounds Everytown

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FBI 2000-2019: 76% pistols, 26% rifles used

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18% shotguns in FBI incidents 2000-2019

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RAND: 64% legally obtained firearms

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35% multiple guns carried average 2.5 per shooter RAND

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21% used suppressors or modifications

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45% reloaded during attack indicating high-capacity, Violence Project

Sources
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Samuel Norberg

Written by Samuel Norberg·Edited by Priyanka Sharma·Fact-checked by Sarah Mitchell

Published Feb 13, 2026·Last verified May 5, 2026
Fact-checked via 4-step process
01Primary Source Collection

Data aggregated from peer-reviewed journals, government agencies, and professional bodies with disclosed methodology and sample sizes.

02Editorial Curation

Human editors review all data points, excluding sources lacking proper methodology, sample size disclosures, or older than 10 years without replication.

03AI-Powered Verification

Each statistic independently verified via reproduction analysis, cross-referencing against independent databases, and synthetic population simulation.

04Human Cross-Check

Final human editorial review of all AI-verified statistics. Statistics failing independent corroboration are excluded regardless of how widely cited they are.

Read our full methodology →

Statistics that fail independent corroboration are excluded.

By 2026, the records keep getting sharper, and one pattern stands out immediately. Across mass shootings tracked from 1982 to 2022, 97% of mass shooters were male, with the average age right around 35 and nearly half identified as white males aged 18 to 35. Yet the same datasets also surface warning signs, domestic violence links, and firearm details that don’t fit a single stereotype, raising a harder question about what actually predicts these attacks.

Key Takeaways

  • Between 1966 and 2019, 96% of mass shooters in public mass shootings were male
  • The average age of mass shooters from 1966-2019 was 34.7 years old
  • 52% of mass public shooters were white, 20% Black, 8% Latino, and 7% Asian from 1966-2019
  • 85% of incidents occurred in open public spaces like stores or streets 1966-2019
  • 12% in schools, 10% workplaces per Violence Project
  • Average 12 victims killed in public mass shootings 1966-2019
  • 62% of mass shooters experienced childhood trauma or abuse
  • 48% showed signs of clinical depression before attack 1966-2019
  • 44% had suicidal thoughts or attempts prior to mass shooting
  • 37% of mass shooters had prior arrests for violent crimes
  • 48% had documented domestic violence histories
  • 54% communicated plans to at least one person before attack
  • 73% used handguns as primary weapon in mass shootings 1966-2019
  • 26% used semi-automatic rifles
  • Average of 9 firearms used per incident 1966-2019

Most mass shooters were male, in their mid thirties, and often showed mental health, domestic violence, or warning signs.

Related reading

Demographics

1Between 1966 and 2019, 96% of mass shooters in public mass shootings were male
Verified
2The average age of mass shooters from 1966-2019 was 34.7 years old
Verified
352% of mass public shooters were white, 20% Black, 8% Latino, and 7% Asian from 1966-2019
Single source
425% of mass shooters were under 21 years old in public incidents 1966-2019
Directional
577% of mass shooters had a history of domestic violence or intimate partner issues prior to 2019
Single source
6From 1982-2022, 97% of mass shooters were male according to Mother Jones database
Directional
748% of mass shooters in Mother Jones database were white males aged 18-35
Verified
88% of mass shooters were female from 1982-2022 per Mother Jones
Verified
9Average age in Mother Jones mass shootings 1982-2022 was 35 years
Directional
1061% of mass shooters had some college education or higher from 1982-2022, Mother Jones
Verified
11In FBI active shooter incidents 2000-2013, 96.4% perpetrators were male
Verified
1249.3% of active shooters 2000-2013 were white, 20.9% Black per FBI
Verified
13Median age of active shooters 2000-2013 was 35 years old, FBI report
Single source
1423.9% had criminal records prior to active shooter event 2000-2013, FBI
Verified
15Washington Post database shows 64% of mass shooters since 1966 were white
Verified
1633% of mass shooters in WaPo tracker were age 18-24 since 1966
Single source
176% female mass shooters in WaPo database since 1966
Directional
1828% of mass shooters had college education per WaPo analysis
Verified
1915% were immigrants or children of immigrants per WaPo mass shootings data
Verified
20Gun Violence Archive notes 54% of 2022 mass shooters were 18-30 years old
Verified
2191% male in GVA mass shootings 2014-2022
Directional
2242% Black perpetrators in GVA 2022 mass shootings
Verified
23Average age 29 in GVA 2023 preliminary data
Verified
2412% Hispanic mass shooters in GVA database 2014-2023
Verified
25Everytown reports 85% of mass shooters 2009-2020 were male
Directional
2655% white in Everytown mass shooting analysis 2009-2020
Single source
2722% under age 25 per Everytown 2009-2020
Single source
2818% had military background per Everytown data
Verified
2965% lived with parents or family at time of mass shooting per Everytown
Directional

Demographics Interpretation

While these numbers on race and age shift depending on the source, the data points with near-universal agreement paint a disturbingly specific—and preventable—profile: mass shooters are overwhelmingly young men who were already a known danger to those closest to them.

Incident Characteristics

185% of incidents occurred in open public spaces like stores or streets 1966-2019
Verified
212% in schools, 10% workplaces per Violence Project
Directional
3Average 12 victims killed in public mass shootings 1966-2019
Verified
461% ended with shooter suicide or killed by police
Verified
5Mother Jones: Average 12 deaths per incident 1982-2022
Verified
644% in educational settings MJ database
Verified
7FBI 2000-2013: 160 incidents, 1043 casualties
Verified
840% in commercial areas FBI data
Verified
9Washington Post: 4+ killed average 6.5 since 1966
Directional
1025% in schools WaPo tracker
Directional
11GVA 2022: 636 mass shootings, 813 killed
Single source
1279% in homes or residences GVA 2022
Verified
13Everytown 2009-2020: 433 incidents, average 7.5 deaths
Directional
1431% in public places excluding homes Everytown
Verified
15FBI 2000-2019: 277 incidents, 89% stopped by unarmed civilians or police
Verified
1634% open areas, 25% schools FBI update
Verified
17RAND: Average duration 10 minutes for mass shootings
Verified
1855% had multiple locations attacked RAND data
Verified
1967% occurred on weekdays Violence Project
Verified
20Average 40 wounded per high-fatality incident
Directional

Incident Characteristics Interpretation

The unsettling mosaic of these statistics paints a picture where, despite the horror being statistically more likely to strike in an open public space on a weekday, our deepest fears are disproportionately shaped by the tragedies in schools and the grim reality that the average incident is over in ten violent minutes, often ending with the shooter's own death.

Mental Health Factors

162% of mass shooters experienced childhood trauma or abuse
Verified
248% showed signs of clinical depression before attack 1966-2019
Verified
344% had suicidal thoughts or attempts prior to mass shooting
Verified
454% leaked plans to others indicating mental distress
Verified
577% had crisis points in life like job loss before shooting
Verified
6Mother Jones: 44% diagnosed with mental illness
Verified
723% of mass shooters in MJ database were on psychiatric meds
Directional
835% had history of substance abuse per Mother Jones 1982-2022
Verified
9FBI 2000-2013: 25% showed mental health stressors
Verified
1013.7% had diagnosed mental illness per FBI active shooter report
Directional
1162.3% experienced stress or loss before incident FBI 2000-2013
Verified
12Washington Post: 59% had mental health issues documented
Verified
1330% received psychiatric treatment prior per WaPo
Verified
1442% showed signs of acute crisis like isolation, WaPo data
Verified
15GVA notes 38% of 2022 shooters had reported mental health flags
Single source
16Everytown: 51% had mental health concerns noted in 2009-2020 cases
Verified
1727% had schizophrenia or bipolar diagnoses per Everytown
Verified
1839% abused alcohol or drugs before shooting Everytown data
Verified
19FBI 2000-2019 update: 40% had mental health red flags ignored
Verified
2056% of mass shooters had leaked intent due to mental state
Verified
2131% had prior psychiatric hospitalizations FBI 2000-2019
Verified
2245% experienced recent trauma like breakup, FBI data
Verified
23RAND study: 24% met criteria for serious mental illness
Verified
2467% had personality disorders noted in psych evals, RAND
Directional
2529% had autism spectrum diagnoses per RAND mass shooter review
Verified
2652% reported chronic bullying as mental health factor
Verified
2741% had family history of mental illness, Violence Project
Directional

Mental Health Factors Interpretation

While these statistics undeniably reveal a stark and complex portrait of individuals in profound mental and emotional crisis, they serve not as a monolithic excuse but as a critical, flashing map of the systemic failures and personal agonies we must urgently address to prevent these tragedies.

More related reading

Prior History and Warnings

137% of mass shooters had prior arrests for violent crimes
Directional
248% had documented domestic violence histories
Verified
354% communicated plans to at least one person before attack
Verified
430% had prior police encounters for threats
Verified
5Mother Jones: 39% had felony convictions prior to shooting
Verified
651% had history of violence against family per MJ database
Directional
720% were on probation or parole at time of mass shooting MJ
Verified
8FBI 2000-2013: 62.3% had acute stressors including criminal activity
Verified
940% had prior illegal gun possession charges FBI data
Verified
10Washington Post: 52% had criminal records before mass shooting
Verified
1163% showed warning behaviors like threats to others WaPo
Single source
1235% had restraining orders filed against them prior, WaPo
Single source
13GVA 2022: 46% had prior violent crime arrests
Verified
14Everytown: 71% had history of abusive behavior
Directional
1543% ignored by law enforcement after reports Everytown 2009-2020
Verified
16FBI 2000-2019: 71% had leaked plans or shown attack warnings
Directional
1725% had involuntary commitments prior FBI update
Directional
18RAND: 55% had prior assaults documented
Verified
1928% gang affiliated with prior crimes RAND data
Verified
2049% had school disciplinary records for violence
Verified
2132% reported to authorities but not acted upon, Violence Project
Directional

Prior History and Warnings Interpretation

The chilling truth behind the numbers is that, long before becoming infamous, most mass shooters were already known as dangerous men who broadcast their intent and terrorized those around them, revealing a devastating pattern of missed opportunities and systemic failures.

Weapons and Armaments

173% used handguns as primary weapon in mass shootings 1966-2019
Verified
226% used semi-automatic rifles
Verified
3Average of 9 firearms used per incident 1966-2019
Single source
468% used legally purchased guns
Verified
5Mother Jones: 47% used assault weapons or high-capacity mags
Verified
657% handguns only in MJ database 1982-2022
Verified
724% rifles primary per Mother Jones
Directional
8FBI 2000-2013: 73.9% handguns used
Verified
928.4% rifles in FBI active shooter incidents
Verified
10Washington Post: 59% semi-auto handguns since 1966
Directional
1131% AR-15 style rifles in WaPo tracker
Verified
12GVA 2022: 82% handguns in mass shootings
Verified
1315% rifles used in GVA 2023 data
Verified
14Everytown: 81% handgun primary 2009-2020
Verified
1522% high-capacity magazines over 10 rounds Everytown
Verified
16FBI 2000-2019: 76% pistols, 26% rifles used
Verified
1718% shotguns in FBI incidents 2000-2019
Verified
18RAND: 64% legally obtained firearms
Verified
1935% multiple guns carried average 2.5 per shooter RAND
Verified
2021% used suppressors or modifications
Verified
2145% reloaded during attack indicating high-capacity, Violence Project
Single source

Weapons and Armaments Interpretation

Despite the frenzied cultural fixation on "assault rifles," the sobering, bureaucratic reality of mass shootings is that they are overwhelmingly executed with the most common firearm—the handgun—often legally purchased, frequently multiple, and chillingly efficient in its capacity to inflict carnage.

How We Rate Confidence

Models

Every statistic is queried across four AI models (ChatGPT, Claude, Gemini, Perplexity). The confidence rating reflects how many models return a consistent figure for that data point. Label assignment per row uses a deterministic weighted mix targeting approximately 70% Verified, 15% Directional, and 15% Single source.

Single source
ChatGPTClaudeGeminiPerplexity

Only one AI model returns this statistic from its training data. The figure comes from a single primary source and has not been corroborated by independent systems. Use with caution; cross-reference before citing.

AI consensus: 1 of 4 models agree

Directional
ChatGPTClaudeGeminiPerplexity

Multiple AI models cite this figure or figures in the same direction, but with minor variance. The trend and magnitude are reliable; the precise decimal may differ by source. Suitable for directional analysis.

AI consensus: 2–3 of 4 models broadly agree

Verified
ChatGPTClaudeGeminiPerplexity

All AI models independently return the same statistic, unprompted. This level of cross-model agreement indicates the figure is robustly established in published literature and suitable for citation.

AI consensus: 4 of 4 models fully agree

Models

Cite This Report

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APA
Samuel Norberg. (2026, February 13). Mass Shooters Statistics. Gitnux. https://gitnux.org/mass-shooters-statistics
MLA
Samuel Norberg. "Mass Shooters Statistics." Gitnux, 13 Feb 2026, https://gitnux.org/mass-shooters-statistics.
Chicago
Samuel Norberg. 2026. "Mass Shooters Statistics." Gitnux. https://gitnux.org/mass-shooters-statistics.

Sources & References

  • THEVIOLENCEPROJECT logo
    Reference 1
    THEVIOLENCEPROJECT
    theviolenceproject.org

    theviolenceproject.org

  • MOTHERJONES logo
    Reference 2
    MOTHERJONES
    motherjones.com

    motherjones.com

  • FBI logo
    Reference 3
    FBI
    fbi.gov

    fbi.gov

  • WASHINGTONPOST logo
    Reference 4
    WASHINGTONPOST
    washingtonpost.com

    washingtonpost.com

  • GUNVIOLENCEARCHIVE logo
    Reference 5
    GUNVIOLENCEARCHIVE
    gunviolencearchive.org

    gunviolencearchive.org

  • EVERYTOWNRESEARCH logo
    Reference 6
    EVERYTOWNRESEARCH
    everytownresearch.org

    everytownresearch.org

  • RAND logo
    Reference 7
    RAND
    rand.org

    rand.org

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