San Diego Teen’s Gun Factory Exposed!

A 16-year-old San Diego student was not just caught carrying a gun at school — police say he was manufacturing untraceable ghost guns with a 3D printer and supplying them to classmates.

Story Highlights

San Diego police arrested a 16-year-old at Garfield High School on May 6 after obtaining a warrant tied to firearm supply and a trolley-station robbery.
Officers found a loaded handgun concealed in the teen’s pants at the time of his on-campus arrest.
A search of the teen’s home uncovered a 3D printer, handgun parts, machine gun conversion devices, ammunition, and additional magazines.
Police are investigating whether the teen was supplying homemade, untraceable firearms to other juveniles at the school.

Arrested on Campus With a Loaded Gun

San Diego Police Department officers, assisted by multiple agencies, arrested the 16-year-old at Garfield High School on May 6 after securing a warrant. At the time of the arrest, police say the student had a loaded handgun concealed in his pants. The teen was subsequently booked into a juvenile detention facility on charges that include robbery, illegal gun possession, and additional gun-related offenses, according to reporting from ABC 10 News.

The San Diego Police Department’s Ghost Gun Apprehension Team had been tracking the teen prior to the arrest. Investigators determined he was allegedly involved in a recent robbery at a trolley station in addition to the firearms activity. The combination of campus gun possession, robbery suspicion, and alleged manufacturing activity made this case stand out even by the increasingly grim standards of juvenile weapons incidents in California.

A Home Workshop Built for Ghost Guns

A search of the teen’s home turned up a troubling inventory of gun-making materials. According to NBC 7 San Diego, officers recovered multiple lower receivers for handguns, ammunition, a 3D printer, carbon filament, 3D-printed machine gun conversion devices, and a handgun magazine. The equipment points to a deliberate operation — not a single firearm acquired through ordinary means, but a home-based production setup capable of churning out untraceable, unserialized weapons that bypass the background check system entirely.

Ghost guns — homemade, unserialized firearms that leave no paper trail — have surged in frequency across law enforcement seizures in recent years. They are particularly alarming in the hands of juveniles because they are nearly impossible to trace once distributed. California already has some of the strictest gun laws in the country, yet those laws did nothing to stop a teenager from allegedly printing and assembling functional firearms in his bedroom and walking one onto a high school campus.

Supplying Classmates — and the Broader Warning

Beyond the campus arrest itself, investigators are examining whether this teen was actively supplying firearms to other students. NBC 7 reported that police were specifically investigating whether he distributed guns to other juveniles. If that allegation proves out, the case moves from a troubling individual incident into something far more dangerous — a peer-to-peer weapons pipeline operating inside a public school, fueled by consumer-grade technology that anyone can buy online.

Garfield High student, 16, arrested on suspicion of bringing loaded gun to school https://t.co/s3f9H8sgPT

— The San Diego Union-Tribune (@sdut) May 14, 2026

Garfield High School Principal Guillermo Medina confirmed the school would pursue expulsion, noting that bringing a firearm onto campus triggers an automatic recommendation under district policy. That procedural response is appropriate, but it does not address the larger failure on display here. California’s progressive policymakers have spent years prioritizing leniency in juvenile justice, restricting law enforcement tools, and resisting commonsense measures that might have flagged this teen earlier. When a 16-year-old is allegedly running a ghost gun supply operation for his classmates, the system has already failed — and no expulsion recommendation changes that reality.