NPR

Mass Shootings Can Be Contagious, Research Shows

It may not be a coincidence that several mass shootings took place in one week. Research shows perpetrators are often inspired by media coverage of other shootings.
Source: Mario Tama

There were three high-profile shootings across the country in one week: The shooting in Gilroy, Calif., on July 28, and then the back-to-back shootings in El Paso, Texas, and Dayton, Ohio, this past weekend.

That's no surprise, say scientists who study mass shootings. Research shows that these incidents usually occur in clusters and tend to be contagious. Intensive media coverage seems to drive the contagion, the researchers say.

Back in 2014 and 2015, researchers at Arizona State University analyzed data on cases of mass violence. They included 's data on mass killings (defined as four or.

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