Records show that two other boys complained of being choked at the Panama City boot camp where a boy died after collapsing with breathing problems last month.
The complaints detail incidents in which guards applied pressure to juveniles' necks to force them into compliance. In both cases, investigators with the Bay County Sheriff's Office found excessive force was not used. The Sheriff's Office operates the boot camp.
The complaints were never investigated by the Florida Department of Juvenile Justice because state regulations allow the Sheriff's Office to rule on abuse allegations at its own camp.
The Florida Department of Law Enforcement is investigating the death of 14-year-old Martin Lee Anderson. He collapsed after complaining of breathing problems while doing exercises at the camp. The Sheriff's Office has said officers restrained Anderson after he became uncooperative.
A preliminary autopsy report has ruled out trauma or injury as the cause of death.