Breaking down Mass Public Shooting data from 1998 though June 2019: Info on weapons used; gun-free zones; racial, age, and gender demographics

7 Jul , 2019  

The Excel file with detailed information on mass public shootings is available here. With all the discussion about having another assault weapon ban, only 13% of mass public shootings are done with any type of rifle. Among the other findings, about 9 in 10 of the attacks are in gun-free zones, more than half the shooters are over age 30 and over 80 percent are at least 21 years of age. 96% are male and 58% are white. Still for many it might be surprising that such a large percentage of these attackers are minorities and that most are much other than K-12 or college age shooters. Earlier work that we had done showed that the vast majority of these killers have no religious or political views.








, ,

12 Responses

  1. Dr Stinde PhD says:

    Thank the. Your research is right on

  2. Heartland Patriot says:

    Excellent information. However, political affiliation or ideological leaning, when known, would have been useful, too. After all, the mass news media acts as if every shooter is a “right-wing gun-toting redneck racist, etc, etc, blah, blah, blah”. In reality, most of the mass killers don’t seem like they would even have been NRA members, much less fitting in some sort of ultra-conservative category.

  3. Duane Spellecacy says:

    Obviously, Gun Free Zones are an Issue, and ‘rifles’ are NOT the problem…
    You Racial Demographic could be (or IS) Extremely Misleading to anyone that isn’t aware of the Same breakdown of Race Percentages. You should probably add that in…

  4. Zundfolge says:

    One additional pie chart I’d like to see posted with this data is:
    “total homicides committed as part of a mass shooting”
    “total homicides not committed as part of a mass shooting”.

    I imagine it would be a giant blue circle with a tiny orange sliver.

  5. Charles Jessee says:

    So the restrictions 21yr to buy firearms would have addressed no more than 18% *if* the shooters actually attempted to legally obtain firearms. Another “Tip of the Iceberg” gun law that misses the mark…

  6. Tom Campbell says:

    We could use a comment on the 11% Non-GFZ statistic versus the 98% since 1950 or some such.
    Should one believe that the something is happening to increase the number of MPSs in GFZs compared to the longer time line? We’ve been seeing the 98% for quite a long time.

  7. Tom Campbell says:

    Sorry, the long touted 98% is for MPSs in GFZs. Now we are seeing 89% in GFZs. What’s going on?

    • Mike Vonn says:

      This is a different period of evaluation. The 98% number, If I recall correctly, addressed all shootings between 1950 and 2012. This period is from 1998 to 2019.

  8. Mike Vonn says:

    In this file, you have the 2017 Mass shooting in Las Vegas as occuring not in a gun free zone.

    The shooters platform was a gun free zone (

    And the shooters targets were in a gun free zone (

    Now, I understand that this can get dirty when we are talking about big places, but all of his targets were in a gun free zone, as well as anyone in the hotel that could have responded with lethal force. That leaves very few effective responders, which is what this metric is actually attempting to measure

Leave a Reply

Your email address will not be published. Required fields are marked *