Interesting.
BTW, how did they determine that the edge was wrapped under the chin, considering that it wasn't physically attached to the face when it was found?
The mandible was kept in place by it. The mandible is attached by muscle and ligaments only, in life. When all those soft tissues decompose,the mandible will drop away from the skull -unless of course you are Caylee, where the tape secured it in its anatomical position..