Police say the two men he pulled over for speeding were real state police agents in an unmarked vehicle.
According to New Mexico State Police, 26-year-old John Shelton, of Logan, was arrested Wednesday following the sham traffic stop in San Miguel County.
Investigators say Shelton had a pistol on his hip and told the agents he was a member of the New Mexico State Police Search and Rescue and a trained law enforcement officer - something officials later discovered wasn't true.
Shelton is facing charges of impersonating an officer.
It was not clear if Shelton had an attorney.