(snipped for focus by me)I have had a thought. With the knowledge that PE took his victim back to her car after abducting her in handcuffs to his shed - could he have had a vehicle on the private road and smashed and tossed Libby's phone away in "the general area" before also abducting them back to his shed. Returning them via the cemetery to the area he took them from (like he did with the woman victim) but then killing them there in the woods in a physchotic episode. He liked the woods and Harry Potter. I know it sounds crazy but he was crazy.
MOO
BBM
Do we know PE liked Harry Potter, or even knew much about HP?
My impression was that HP was introduced in the discussion here of unicorns, as one example of unicorn myth PE could have been referring to when he described the girls as "unicorns" - not that PE directly referenced HP in his own rambly words, writing, or according to a source.
edit: clarity