Xiao Li 's family said he had n't eaten anything 20 minutes before the tragedy . Boy had been playing hide-and-seek with his friends . He 'd been poisoned by candy he 'd found on the ground behind their house . Rat poison was found in the boy 's system after his death . Doctors at Jining Affiliated Medical School Hospital were left helpless .
Boy 's family said he had n't eaten anything 20 minutes before the tragedy . Xiao Li had been playing hide-and-seek with his friends . He 'd been poisoned by candy he 'd found on the ground behind their house . Rat poison was found in the boy 's system after his death . Doctors at Jining Affiliated Medical School Hospital were left helpless .