3D-printed weapons are showing up in Arizona schools, investigation finds

PHOENIX — A new investigative newsroom focused on Arizona education is shining a light on an emerging campus safety concern: 3D-printed weapons in the hands of students, some as young as 10 years old.

The Beam, a local accountability publication based at the Howard Center for Investigative Journalism at Arizona State University, launched this spring with a mission to dig into K-12 issues across the state with a focus on transparency, data and student impact. Its team of professional journalists works alongside ASU students to produce in-depth reporting on challenges facing Arizona schools and families.

Its inaugural investigation examines how the growing accessibility of 3D printers and the ease of finding weapon design files online are creating a gap that many school districts are not yet prepared to address.

Investigative journalist Alice Driver with The Bean filed public records requests with roughly 20 Arizona school districts, asking what types of weapons were being confiscated on campuses. What she found surprised her.

“I sent records requests to about 20 school districts… and I was surprised to see 3D printed weapons on some of the records,” said Driver. 

The items ranged from knives to gun components. In most cases, the objects were printed at home using designs readily available through a quick online search. One incident involved a fifth-grader bringing a 3D-printed butterfly knife to an elementary school campus, which was one of the youngest cases identified in the investigation.

Driver also found inconsistencies in how districts responded: how the items were classified, what disciplinary action was taken and whether parents were notified. In several cases, the wider school community was not alerted at all.

“Are we treating these as weapons? Are we treating them as toys? What kind of disciplinary action are we looking at?” questioned Driver. 

Colton Easton with Safer Schools Together, an organization that provides violence prevention training to schools, says the problem is real and growing.

“I’d say it’s emerging and picking up speed… a student can find step-by-step instructions in minutes,” said Easton, who adds, the concern isn’t just what’s being found on campuses, it’s what isn’t.

“For every weapon that gets found… There are still students at home right now researching how to build them,” he said.

Part of the challenge is perception. Driver found that in some cases, students didn’t see what they created as dangerous.

“They thought of it like a fidget spinner, when in reality it was a butterfly knife; it can still cause harm,” said Driver. 

Experts note that even a blunt polymer blade can be strong enough to cause serious injury, underscoring why the classification of these items matters.

Safety experts say many schools are operating with outdated policies that don’t account for the reality of home manufacturing technology.

“Most schools have safety rules; the health aspect is covered, but security is wide open,” said Easton. 

Experts are calling on districts to adopt clear, specific language in their weapons policies and to improve communication with families about what students may be accessing at home.

“This isn’t a future problem, it’s already happening. So the question isn’t “How do we deal with it?” It’s, ‘How can we get ahead of it?'” said Easton.  

He said parents are the first line of defense. Start by asking questions about what your child downloads and prints at home. Know what design files are on shared devices, and talk openly about why 3D-printed objects, even those that look like toys, can cause real harm.

Safer Schools Together offers training for schools to identify and adapt to safety trends and challenges, as well as tools for parents. 

You can read the full findings of The Beam’s investigation here.

This story is made possible through grant funding from the Arizona Local News Foundation’s Arizona Community Collaborative Fund. 

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