Okay,if we go with this theory of a mysterious person known to the "Dunn" family,if this unnamed mysterious person took her,there would be no reason to not take a bag of her things since she told SA she was spending the night at someone's house.Sooo,for this to be made to look like an abduction,so she could leave with this person,she would have to be in on it.The person wouldn't want to be hunted down for abducting a minor with a bolo all over the country,so that would be stupid.If she was in on it,wouldn't it be more sense to look like she ran away?Which also would be no reason for her not to take her hoodie and shoes,at least.If she was making an excuse to be out all night,hello,she'd still take her hoodie.