Several guns were recovered and three people were detained when authorities investigated a suspicious vehicle near the Capitol, U.S. Capitol Police said Wednesday. The three told officers they were there to deliver documents to the Supreme Court, Capitol Police said.  Tony H. Payne, 80, of Tunnel Hill, Georgia, was later arrested on weapons charges, Capitol police said, and his adult grandson was turned over to D.C. Disability Services. A woman who was with them was detained and released.   Payne is facing three charges: unregistered firearm, unregistered ammunition, and carrying a pistol without a license, Capitol police said. According to Capitol police, officers noticed a white van was illegally parked and a police dog alerted the officers, prompting a search. One of the men told officers he had guns, which are still banned on Capitol grounds. Officers found two handguns and a shotgun in the vehicle, Capitol Police said, along with a pipe and containers. A hazmat team was also calle