(REUTERS) By Matt Mills McKnight  BURLINGTON, Wash. The gunman believed to have opened fire with a rifle at a Washington state mall, killing five people, was captured on Saturday one day after the attack, authorities said. Authorities identified the shooter as Arcan Cetin, 20, a resident of Oak Harbor, Washington. Police said he was taken into custody without incident in Oak Harbor, some 30 miles (48 km) southwest of Burlington where the shooting occurred […]