She didn't leave on her own because she's so young, and she wasn't abducted. She was in her father's custody and they think he knows more than he's told, and the others in the home or associated with them may have more information.
Not speculating about charging.
They believe foul play is involved, clear ffrom the first week or two, it's a criminal investigation. They will not stop until they find her. It's a missing person's investigation until they determine otherwise
He is free to go just as you and I (I didn't hear the question, assuming it refers to JDP)
30 days of the reward left.