Florida ? The body of a boy who died after a videotaped beating by guards at a juvenile boot camp was exhumed Friday for a second autopsy, his mother weeping as his coffin was raised.

The body of Martin Lee Anderson was to be taken to Tampa; Hillsborough County’s medical examiner was scheduled to conduct the autopsy Monday.

Surveillance video from the camp shows guards punching and kicking the 14-year-old on Jan. 5. He died the next day.

Bay County’s medical examiner concluded that he died of complications of sickle cell trait, but several experts in the usually benign blood disorder have questioned that finding.

Officials for the Bay County Sheriff’s Office, which ran the camp, said guards restrained Anderson after he became uncooperative during exercises.