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Date: 05-26-2023

Case Style:

United States of America v. Matthew Phillip Hamper

Case Number:


Court: United States District Court for the District of Montana (Cascade County)

Plaintiff's Attorney: United States Attorney’s Office in Great Falls

Defendant's Attorney:

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Description: Great Falls, Montana criminal defense lawyer represented Defendant charged with trafficking methamphetamine and possessing a homemade firearm.

In 2021, law enforcement learned that Matthew Phillip Hamper, age 43, who was on state supervision, was selling meth in the Helena area and identified him as the supplier in several controlled purchases. Montana probation officers conducted a search of Hamper’s home and an RV parked next to the main house. Inside the RV, officers found nearly four pounds of meth and several firearms, including a homemade single shot “slap gun.” The Bureau of Alcohol, Tobacco, Firearms and Explosives determined that the “slap gun” met the definition of a destructive device and that it was not registered in the National Firearms Regulation and Transfer Record.

Slap gun. Photo: Omitted

Assistant U.S. Attorney Jeffrey K. Starnes prosecuted the case, which was investigated by the Bureau of Alcohol, Tobacco, Firearms and Explosives, Missouri River Drug Task Force, Jefferson County Sheriff's Office, the Montana Division of Criminal Investigation and Montana Probation and Parole.

This case is part of Project Safe Neighborhoods (PSN), a program bringing together all levels of law enforcement and the communities they serve to reduce violent crime and gun violence, and to make our neighborhoods safer for everyone. On May 26, 2021, the Department launched a violent crime reduction strategy strengthening PSN based on these core principles: fostering trust and legitimacy in our communities, supporting community-based organizations that help prevent violence from occurring in the first place, setting focused and strategic enforcement priorities, and measuring the results.

Outcome: Defendant was sentenced to 15 years in prison.

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