Story highlights Authorities searched for 12-year-old Charlie Bothuell V for 11 days

His father had reported him missing

He was found barricaded in his father's basement

In court papers, the boy tells of forced twice-a-day exercise that included 100 push-ups

Twice each day, 12-year-old Charlie Bothuell V says in court documents, he was forced to do 100 push-ups, 200 sit-ups and 100 jumping jacks. He told child welfare investigators in Michigan that he'd have to curl a 25-pound weight on each arm and do 5,000 revolutions on an exercise machine, and if he didn't finish in less than an hour, he'd have to do the routine again, according a petition filed in Wayne County court in Michigan this week.

The Detroit boy said that he feared being "in trouble again" for not completinghis work-out routine. Sometimes he couldn't finish because he was in too much pain, he said.

Charlie made national news in June when his father Charlie Bothuell IV said his son went missing for 11 days, prompting a search that involved the FBI and that ended bizarrely when the child turned up barricaded in the father's basement.

The father was talking live on air with HLN's Nancy Grace when he learned that state police had discovered his son, appearing shocked when Grace told him that she'd just received breaking news about it.

On her show, the elder Bothuell became visibly upset. He started breathing hard and clutching at his chest, and told Grace that he had no idea how his son could have been in the basement.

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