Schneider says Bowman approached a security checkpoint near the Cannon House Office Building in a 4-door Honda Civic and told officers he wanted to park.
People who want to get into the area must have a permit and have their vehicles searched. The timing of the request raised an officer's suspicion, Schneider said, and Bowman consented to a vehicle search.
Schneider said a shotgun and ammunition were found in Bowman's trunk. Bowman was charged with having an unregistered firearm and ammunition, she said.
A telephone directory lists a Joshua Bowman in Falls Church, but the telephone rang unanswered Thursday afternoon.