I agree, how could they prove conclusively he had been there on November 18-19th? Items of clothing prove nothing. DNA, fingerprints, not really proof, time-wise. Rumpled bedding, the same. The only way I can think of is if he called someone and said he was there, but that did not happen.
If in fact LE does not even know this much, how on earth can they ever solve this case? I am NOT saying the don't know, but if they don't, they can have no idea what they have here, IMO.
I agree. Unless they find Dylan, I believe it's going into the cold case category.