The basement had no restroom, but investigators are working on an assumption that he had access to one, according to Woody.
Woody said police have not ruled out charges in the case. He said investigators found bloody clothing at the home but did not elaborate on its significance or say where exactly it was found.
On Wednesday, Craig, the police chief, said investigators had searched the home four times, including once with a cadaver dog.
"We're not certain Charlie was here during those visits," he said.
Craig was asked during an impromptu news conference Wednesday whether an adult was responsible for hiding the boy in the basement.
"We're not ruling that out," he said. "It would be hard for me to sit here and tell you that someone didn't know Charlie was there, but I can't say definitively."