Billings felon sentenced for illegal possession of firearms

BILLINGS - A Billings man with a felony conviction for strangulation of a family member who sold multiple guns to undercover agents was sentenced yesterday to 57 months in prison to be followed by 3 years of supervised release, Acting U.S. Attorney Tim Racicot said.

Frank Spencer Marr, 50, pleaded guilty in July 2025 to one count of prohibited person in possession of a firearm and ammunition.

U.S. District Judge Susan P. Watters presided.

The government alleged in court documents that on September 27, 2024, law enforcement conducted an undercover methamphetamine purchase from Marr in Billings. After the drug transaction, he offered to sell investigators a Taurus 9 mm pistol for $300. They agreed to buy the gun, but Marr left and did not return.

Investigators contacted Marr later, who agreed to sell a different pistol to them. A controlled purchase of the pistol took place on January 29, 2025, in Billings. In exchange for $400, Marr sold a Glock model 20, 10 mm pistol.

On February 18, 2025, Marr contacted investigators and said he had an "Italian 9 mm" he would be willing to sell them. The following day, he contacted investigators again to advise he had sold the "Italian 9 mm," but would be willing to sell them an AR-15; 1,500 rounds of .223 ammunition; and 4 magazines. That same day, investigators conducted a controlled purchase of a Surplus Ammo & Arms model Low 15 semiautomatic rifle and 780 rounds of ammunition.

Marr reached out the following week and claimed he had more firearms to sell. Investigators arranged for the controlled purchase of an Armscor model 1911-A1 FS 9 mm pistol on February 27. An undercover agent picked up Marr at his residence and drove him to an agreed-upon location for the purchase. When they arrived, the agent bought the 1911 from Marr and left the vehicle. Other law enforcement officers on scene converged on the vehicle and arrested him.

During a subsequent interview, Marr admitted to possessing the 1911 pistol he sold to law enforcement for "6 or 7 years."

Assistant U.S. Attorney Jacob Yerger prosecuted the case. The ATF, Montana Division of Criminal Investigation and Billings Police Department conducted the investigation.

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