When the 5-year-old boy ran home bleeding and weeping, his family first thought he had injured himself in a fall. At the doctor, they discovered Zainul Abideen had been stabbed, with wounds to the chest and abdomen requiring 20 stitches. Now they believe the boy was attacked by a serial killer targeting young children in this small town, where three children have been knifed to death in the past three weeks. Police say the slayings could be part of a black magic rite and have arrested about 20 suspects. One confessed to the first three assaults, including stabbing Zainul. Then,...