an appeals court in chile has thrown out the charges that led to the arrest of former military ruler augusto pinochet 
a special investigating judge had ordered the 85 year old general be held under house arrest and tried for the disappearance of 19 people in 1973 
pinochet returned to chile from britain last march after british judges ruled he was physically and mentally unfit to stand trial 
prosecutors in chile say they will appeal today's decision to the highest court