Mass shootings, which had become far less frequent in 2020, have come roaring back. On Monday, a gunman opened fire at a grocery store in Boulder, Colo., killing 10. And this comes on the heels of the Atlanta spa attacks last week that killed eight.

We’ve been studying mass shootings, defined as four or more people shot and killed in a public setting, since 2017 for a project funded by the U.S. Department of Justice. The question we were asked repeatedly during 2020 was why mass shootings had dropped off so dramatically. Now we’re being asked why there is such a sharp uptick…

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Authors: Jillian Peterson and James Densley
Source: Los Angeles Times
Reprinted in the Star Tribune, Wisconsin State Tribune, MSN, Newsday, and Qatar Tribune.
In Spanish: ¿Por qué los tiroteos masivos se detuvieron en 2020 – y por qué ahora están volviendo? Los Angeles Times.