US owns almost half of all the guns in the world, around 500 million
Active shootings represent a very small percentage of on-campus university violence.
Wrong questions. Wrong answers
But among those that do happen, there are patterns. And as law enforcement officials continue to investigate the Dec. 13, 2025, Brown University shooting, similarities can be seen with other active shooter cases on college campuses that scholar James Densley has studied. “They tend to happen inside a classroom, and there tends to be multiple victims,” Densley explains.
The Brown University tragedy, in which a shooter killed two students and injured nine more, marks the fourth deadly shooting at a U.S. university in 2025.
The Department of Education in Rhode Island, where Brown University is located, said on Dec. 16 that it is urging local elementary and secondary schools to review safety protocols.
Amy Lieberman, the education editor at The Conversation U.S., spoke with Densley about how schools have been given what he describes as an “impossible mandate” to try to prevent shootings.
What is the overall trajectory of school shootings over the past few years?
K-12 school shootings appear to be trending downward, at least in the past two years. But we actually saw the largest jumps in this type of violence in the three to five years leading up to 2024, which trends closely with the broader rise in homicide and violent crime we saw in the pandemic era.
In 2025, there have been 230 school shooting incidents in the U.S. – still a staggeringly high number. This compares with 336 school shootings in 2024, 352 in 2023, 308 in 2022, and 257 in 2021.
How this relates to an increase in schools trying to institute security measures to prevent shootings is an open question. But it’s true that many schools are experimenting with certain solutions, like cameras, drones, AI threat detection, weapons scanners, panic apps and facial recognition, even if there is only weak or emerging evidence about how well they work.
Schools are treated as the front line, because the larger, structural solutions are too difficult to confront. It is much easier to blame schools after a tragedy than to actually address firearm access, grievance pathways – meaning how a person becomes a school shooter – and the other societal problems that are creating these tragedies.











.webp)


