Charlie Bothuell V, who was missing for days before being found Wednesday, told police he was placed in the basement behind boxes by his stepmother and told "not to come out, no matter what he hears."
Court records obtained Friday by the Detroit Free Press have revealed that 12-year-old Charlie told officials that although his stepmother — Monique Dillard-Bothuell — knew he was in the basement, she did not bring him food.
"Charlie reports sneaking upstairs to get food when everyone left the home," the petition says.
The document also offers more information about the abuse Charlie reported he suffered.
Charlie, who police found barricaded in the basement of his home while executing a search warrant, also claimed that his father physically abused him with a PVC pipe.
According to the petition, when Charlie was taken to Children's Hospital of Michigan for treatment after being found, a doctor observed a half-circular scar on the child's chest.
Charlie said the scar was "a result of his father driving a PVC pipe into his chest," according to the petition, which also says the child had old scars on his buttocks from being hit with the pipe.
During a search of the home, authorities recovered a PVC pipe with blood on it, the petition says. It's unclear whose blood it is.
Charlie's father was on live television on HLN with Nancy Grace when he learned that his son had been found in the home's basement.
"We're getting reports that your son has been found in your basement," Grace said.
As the shocked father struggled to comprehend the news - grabbing his chest and looking stunned - Grace demanded to know whether or not he had checked his basement.
He responded: "I checked my basement.
"The FBI checked my basement. The police checked my basement. My wife checked my basement. I've been down there several times. We've all been checking."
Bothuell has denied abusing his son. His lawyer has also denied that a pipe was used to beat Charlie, insisting that the blood found on the child's clothing was from eczema.
"The young man had eczema. ... He scratched it like crazy," Magidson said.
Charlie, along with his two younger siblings, has been removed from his father's care for the time being.