Florida ? Guards at a juvenile detention boot camp struck and restrained a teenager for a half-hour on the day before he died, a videotape released Friday shows.

The boy’s parents said the security tape raised questions about an autopsy that found 14-year-old Martin Lee Anderson died from internal bleeding caused by a genetic blood disorder, and not from any injuries suffered in the Jan. 5 altercation.

Anderson, who entered the camp because of a probation violation, complained of breathing difficulties and collapsed while doing push-ups, sit-ups and other exercises. He died the next day at a Pensacola hospital.

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

State police investigating the case released the tape after a lawsuit by news organizations.