Criminologist at Northeastern University. Manage the Associated Press/USA TODAY/Northeastern University Mass Killing Database.

Boston, MA
Joined April 2010
July 4th and a spillover to July 5th are dates of the year with the most mass shootings. Each date has more than twice as many as the next (which is July 1). This is based on my analysis of incidents with 4+ killed or injured from the @GunViolenceArch:  nytimes.com/2026/07/05/us/sh…
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Correction: “about twice as many” not “more than twice as many”
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Yesterday’s mass shooting of four victims in Livonia, MI, is the 14th mass killing of the year of which 11 were shootings. It is also the 3rd family massacre in 8 days. @NUGlobalNews Source: @AP @USATODAY @Northeastern Mass Killing Database.
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With the 2 family mass killings yesterday, there have been seven so far this year—one more than all of last year. Source: @AP / @USATODAY /@Northeastern mass killing database.
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List of multiple-fatality college campuses shootings in U.S. since 1990 @AP @USATODAY @NUGlobalNews @CNN @BostonGlobe
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The shooting yesterday at #Brown_University is the 29th multiple-fatality shooting at US college campuses since 1990, claiming the lives of 122 victims in total. More than half of the assailants were over 25 and one-third over 30. @AP @Northeastern
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During the FIFA #WorldCup2026 draw yesterday, #trump suggested that we join the rest of the world by adopting the term 'football' instead of 'soccer.’ Well, by that logic, we should join the rest of the world by calling the ‘Gulf of America’ the ‘Gulf of Mexico.’
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Last night’s mass killing in Stockton, CA is the 17th of the year with 4+ victim fatalities, according to a database from the AP/USA TODAY/Northeastern University. Fourteen have been shootings. This year has seen the fewest number since at least 2006. @AP @USATODAY @Northeastern
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#DonaldTrump needs to change hats. A #MAGA cap is appropriate for a presidential candidate, but not for a sitting president. He is president of the entire nation, not just MAGA nation. The president constantly wearing a MAGA hat is divisive. Instead, Trump should wear a #USA hat.
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RFK, Jr. said yesterday that he fired the CDC director because she was untrustworthy. It is more like she was considered unTrumpworthy. @CDCemergency @CDCDirector
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Be careful not to misunderstand the hundreds of school shootings reported by various databases. Almost 90% of these incidents are AT school, not IN school, that is, on school grounds. Many occur at night, on weekends, during summer, and do not involve students. Many do not involve any injuries, and few result in student fatalities. From 2010 through 2023, 94 students were fatally shot inside K-12 schools by an assailant, and 64 of them were from the four extreme cases: Sandy Hook, Parkland, Santa Fe, and Uvalde.
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Notwithstanding the tragedy this morning at a Minneapolis catholic school, mass shootings with 4+ killed or injured are down 24% this year over last, and this is after a 24% decline last year over the previous, according to Gun Violence Archive data. @GunViolence
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Trump ssid yesterday that Putin wants peace. Not exactly…he wants a piece of Ukraine.
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Last Saturday, July 5, had 13 mass shootings (4+ shot, either injured or killed, based on the Gun Violence Archive data). It is likely that many involved July 4th gatherings that spilled past midnight. This is the second most of any date since January 2013. The only date with more was 7/5/2020, which was a Sunday, with 15—although 10 of these occurred between 12 AM and 3 AM, most likely spillovers from July 4th evening gatherings.     Now, from 2013 to the present, these three dates have the most mass shootings:   5-Jul 74 4-Jul 71 1-Jan 38   @northeastern
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