Another thing - if she is that close to the VDS's home. Then they may have evidence that she on the VDS's property.
She may be wrapped tightly in plastic, this would preserve and fibers from a crime scene. I just pray that they pulled the right things from the boy's homes. Like any leftover rope, plastic sheeting, tape, etc. in the event they find any this items with her body.
If she was in the vdS home I hopeful that when she's found there are trace fibers.