Harris County DA pushes 3D printer safeguards to curb ghost guns

Harris County District Attorney Sean Teare joined a June 29 letter asking Creality, Bambu Lab and Flashforge to build safeguards into their 3D printers that could identify and block the printing of firearms and firearm parts. The move, signed by 20 prosecutors across the United States through Prosecutors Against Gun Violence, targets the machinery at the point where a gun can be made at home, before detectives ever see a serial number or a retail purchase record.

Teare’s office defines ghost guns as unserialized firearms that are difficult for law enforcement to trace. In practice, the problem has two layers: a printer can produce gun parts, and those parts can then be assembled privately rather than bought as a finished weapon. Prosecutors are asking the manufacturers to use technology that can stop that process on the front end, a step meant to make it harder to fabricate an untraceable firearm in a bedroom, garage or small workshop.

The stakes are not theoretical in Houston. In 2022, investigators said Roland Caballero had guns with homemade or potentially 3D-printed parts when he was accused of shooting three Houston police officers. A 3D printer was found in his home after the standoff, and he was charged with possession of a machine gun and three counts of attempted capital murder of a police officer. That case gave local law enforcement a concrete example of how printed or privately manufactured parts can surface in a major violent incident.

The broader gun caseload in Harris County shows why Teare is pushing prevention as well as prosecution. In a March 26, 2026 release, the district attorney’s office said guns were involved in 3,452 aggravated charges in 2025, while weapons charges were filed 5,325 times. The office said those figures followed 3,870 aggravated charges involving guns and 5,980 weapons charges in 2024. That record gives the DA a local enforcement backdrop as he presses private manufacturers to help slow a crime trend that investigators say is harder to track once the parts are printed and assembled.

Teare, sworn in as district attorney on January 1, 2025 after defeating Kim Ogg in the Democratic primary and then Republican Dan Simons in the general election, has used the office to push a more aggressive public-safety agenda. The ghost-gun fight now tests whether pressure on 3D-printer makers can meaningfully reduce access, or whether Harris County prosecutors will still be left chasing weapons that were built out of sight and without a trace.