Nowata County Sheriff Terry Sue Barnett cited high levels of carbon monoxide, exposed wires in showers, gas and mold issues.
The unit's end comes after the arrest of vice squad officer Andrew Mitchell, who allegedly forced two women to have sex with him under threat of an arrest.
"I can't say thank you enough to them," the mother said of the officers. "I owe them the world, because they saved my world."
The children told police their adoptive mother starved, beat and pepper sprayed them when they failed to follow direction for videos, officials said.
The suspect had three knives and police believe he ambushed the woman when she walked into the building, NHK public television reported.