Wimbush is a former Georgia Tech player who also briefly signed with the Atlanta Falcons.
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"He was essentially being treated as a prisoner would be treated," Cpl. Jake Smith said when the warrant was issued for the couple earlier this week.
"The window had been painted over. There was no light bulb outside. What was inside was a bucket that the child was using as a bathroom, a mattress and box spring," Smith said.
In the arrest warrant, a dective wrote "Therian and Recardo Sr. justified his treatment in Juvenile Court by saying the boy molested three of the younger siblings. The child stated he was locked in the bedroom located in the basement for taking the family DVD player and lying about it."
Police said they have no evidence to support the molestation claim and the other children did not mention it.
Wimbush played for Georgia Tech from 1999-2002 and led the team in tackles for three years. He signed a contract with the Atlanta Falcons in 2003 but was cut before the season started.
AP contributed to this report.