CLAMPDOWN AT THE BORDER – U.S. Border Patrol agents and law enforcement from other California jurisdictions closed down the international border at San Ysidro Tuesday afternoon after the wallet of renegade former Los Angeles Police officer Christopher Dorner was found on the American side. A subsequent raid of a Tijuana hotel yielded nothing, law enforcement officers said. At the same time southbound border traffic was being searched vehicle-by-vehicle, LAPD and federal law enforcement surrounded a home in Big Bear where Dorner had reportedly tied up two women and stole a vehicle.