A Middlesex County man has been charged with weapons offenses and engaging in illicit sexual conversations with someone he believed was a minor, according to an announcement by Acting Attorney General Jennifer Davenport and the Division of Criminal Justice (DCJ).
Oskar Smieszek, 23, of South Amboy, New Jersey, faces several charges. These include manufacturing an unregistered, unlicensed firearm using a three-dimensional printer (second degree), possessing an unlicensed assault firearm (second degree), possessing large-capacity ammunition magazines (fourth degree), attempted impairing the morals of a child (third degree), and attempting to show obscene material to a child (third degree).
“The charges announced today reflect two major areas of enforcement of our office – protecting children from sexual predators and protecting everyone from gun violence,” said Acting Attorney General Davenport. “So-called ‘ghost’ guns that are made with 3D printers are untraceable, but no less deadly than other weapons. And anyone who tries to use the anonymity of social media sites to prey on children should understand that they will be held accountable.”
DCJ Director Theresa L. Hilton stated, “We discovered this defendant, and his illegal weapons, as he allegedly attempted to arrange a sexual encounter with someone he believed was a child. DCJ will always work with our partners to find and stop those who use social media to exploit or abuse children.”
Lieutenant Colonel David Sierotowicz, Acting Superintendent of the New Jersey State Police, commented: “The charges in this case address two grave threats to public safety: illegal firearms and sexual predators. These dangers have no place in our communities, and we remain steadfast in our commitment to removing them from our streets. Anyone who engages in inappropriate communication with minors will be investigated and held accountable. Protecting our children is among our highest priorities. Likewise, illegal firearms endanger lives and undermine the safety of our neighborhoods. These charges underscore our dedication to safeguarding our communities.”
According to court documents, in April 2025 a law enforcement officer posing as an underage girl on a social media platform received messages from Smieszek. During their exchange, Smieszek discussed meeting for sex and sent sexual images.
A search warrant executed at Smieszek’s residence on February 6, 2026 led officers to seize multiple digital devices along with two unregistered firearms and several high-capacity magazines.
Acting Attorney General Davenport credited the New Jersey State Police for their investigation efforts. The prosecution is being handled by DCJ Deputy Attorney General John Donovan.
Second-degree charges can result in five to ten years in state prison and fines up to $150,000; third-degree charges carry three to five years imprisonment with fines up to $15,000; fourth-degree offenses may lead up to 18 months in prison with fines up to $10,000.
The New Jersey Attorney General’s office oversees law enforcement across all counties and municipalities statewide https://www.njoag.gov/. Its responsibilities include enforcing laws related to public safety matters such as those alleged here https://www.njoag.gov/. The agency also provides legal representation for the state government as well as support for victims and consumer protection programs https://www.njoag.gov/.
No defense counsel has been listed yet for Smieszek.
