Police, SWAT teams and negotiators surrounded a rural property where a man was believed to be holed up in an underground shelter Wednesday after fatally shooting the driver of a school bus and fleeing with a 6-year-old child passenger.Police, SWAT teams and negotiators surrounded a rural property where a man was believed to be holed up in an underground shelter Wednesday after fatally shooting the driver of a school bus and fleeing with a 6-year-old child passenger.