Christopher Santiago, 21, of Triangle, was charged with impersonating an officer and firefighter following the incident, police said.
Police noticed a car with red and flashing lights at Van Buren Road and Fettler Park Drive in Dumfries on Thursday morning.
When questioned, Santiago told officers that he was a government contractor but then claimed to be a volunteer firefighter, police said.
An investigation revealed that Santiago did not work a law enforcement or government agency, according to police.
Santiago is scheduled to appear in court on Sept. 9.
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