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Associate Professor of Criminal Justice, Penn State
Police stand near the scene where multiple people were shot at the FedEx Ground facility on April 16, 2021, in Indianapolis. AP Photo/Michael Conroy

Are mass shootings an American epidemic?

Gun violence as a whole is much more common, and much more deadly, than mass shootings are.
A Texas school’s tribute to the school shooting in Parkland, Florida. REUTERS/Carlos Garcia Rawlins

Why there’s so much inconsistency in school shooting data

The Department of Education says there were 240 school shootings during a recent school year. Another database only counts 29. How could the numbers be so different – and who is right?
The Brussels Airport begins reopening with new restrictions in place, April 4, 2016. REUTERS/Benoit Doppagne/Pool. REUTERS/Benoit Doppagne

Four questions Belgians should ask about the Patriot Act

The U.S. and France responded to terrorist acts by passing surveillance laws. What could Belgium learn from their example?
Metro Shooting Supplies employee Chris Cox speaks to a customer about the purchase of a 9mm handgun in Bridgeton, Missouri, November 13 2014. Jim Young/Reuters

Do gun purchases go up after mass shootings?

Research on background checks for gun purchases suggests there is an increase in gun acquisition a few months after a mass shooting happens.