A juvenile in Dennis is accused of brandishing a handgun at a victim before fleeing the scene on Tuesday, and when detectives searched the teen's home, they say they found far more than they expected: a 3D printer, rolls of filament, precision toolkits, and multiple partially assembled handguns with homemade frames. No shots were fired and no injuries were reported, but the discovery has thrust a quiet Cape Cod town into a statewide conversation about ghost guns just days after a major Massachusetts gun law deadline passed.
According to Boston 25 News, Dennis Police investigated the reported brandishing and, after obtaining a search warrant for the juvenile's residence, recovered slides, magazines, triggers, springs and other internal firearm components alongside the unfinished weapons. Investigators also seized two laptops and a cellphone as evidence, and they found tools and precision toolkits commonly used to assemble firearms, the outlet reports.
Criminal charges against the juvenile remain pending consultation with the Cape and Islands District Attorney's Office, led by District Attorney Robert Galibois, as Dennis Police continue their active investigation into the incident, according to Newsradio 95 WXTK. Galibois's office oversees prosecutions across Barnstable County, including Dennis.
Chief Warns Parents About What Can Slip Into a Home
Dennis Police Chief Brady said the tools needed to build an untraceable firearm can make their way into a home quickly and quietly, per the Boston 25 News report. Ghost guns lack serial numbers and can be assembled using 3D-printing technology along with other components ordered online, the outlet notes.
Dennis Police are asking parents and guardians to pay closer attention to children's online access, delivered packages, and equipment being used behind closed doors. The department also wants families to stay alert for suspicious behavior that could signal ghost gun activity in their own homes. Officials said they will not release additional information about the juvenile because of the juvenile's age, and the investigation remains ongoing.
A Deadline Just Missed, and a Statewide Vote Looming
The search unfolded just days after an October 2 deadline under Chapter 135 of the Acts of 2024, which required all untraceable firearms, frames and receivers lacking serial numbers to be formally serialized, according to the Serpa Law Office. The same law, signed by Governor Maura Healey in July 2024, explicitly bars unlicensed individuals from using 3D printers or CNC milling machines to manufacture firearms without a valid License to Carry, according to Mass.gov.
Ghost gun cases can involve online parts purchases and YouTube access. Recoveries of 3D-printed firearms may be increasing. The pattern isn't unique to Cape Cod — federal prosecutors indicted an East Boston resident in May 2026 for allegedly running an apartment-based 3D-printed ghost gun operation using parts ordered online, a case Hoodline previously covered.
Juvenile Cases in the District
The Cape and Islands District Attorney's Office processed 427 Juvenile Court charges and six Youthful Offender charges across Barnstable, Dukes and Nantucket counties in 2025.
The case also lands amid a broader statewide fight over the law itself. Massachusetts voters will decide in November on Question 9, a veto referendum asking whether to repeal or uphold Chapter 135, according to Ballotpedia. For now, the Massachusetts Department of Criminal Justice Information Services continues tracking ghost gun seizures statewide through a dashboard launched in October 2025, compiling data submitted by municipal police departments in all 351 cities and towns across the Commonwealth.
