Regarding the sweatshirt that LE was looking for (per the search warrant): If this was a piece of clothing that Dylan had with him and it wasn't located, why wasn't that released from the beginning as an article of clothing that Dylan may have been wearing? I venture to say that it was never seen. Dylan didn't have it on in the surveillance videos.
Also, Dylan was expected to be at his father's house for several days. If his phone was in need of a charge, one would expect to find that charger still plugged into an electrical outlet. LE was looking for the phone charger and didn't find it. This points to a few things for me as possible:
1) Dylan never removed the charger from his pack to charge his possibly dead phone.
2) Dylan did not have his charger with him as assumed. (sort of like the sweatshirt that I can only conclude was never in MR's home- based on it's omission from the descriptions of Dylan and it's absence from the items seized).
3) Dylan had the charger and intended to charge his phone when he got to his friends home.
1)While it is possible Dylan never removed his charger from the pack to charge his possibly dead phone, it's not likely if he was an avid phone user and texter. Especially since it was (up until it went silent) the only way he was communicating with his friends in Bayfield that he wanted to see. Still, it is possible.
2) I thought this also, except that, by now, if his charger were still at home, it would have been found. Unless Dylan had lost it previously and never told anyone. Again, how could he have had a working phone if this were so?
3) Agreed, except why not charge it overnight, like most people do? And if he forgot, why not charge it that morning for a half hour, to get some kind of charge, so he could contact his friends? Yes, possible, but unlikely unless a bunch of circumstances lined up just wrong.
And there is no way I could ever conclude the sweatshirt was never in Marks home, only that it MIGHT not have been, or Mark never saw it. Just because someone doesn't see something, it doesn't mean it isn't there (too many negatives....argh!) LE could never completely rule something out just because Mark didn't see it, unless Mark looked through everything in Dylan's backpack that night. If it is missing from Dylan's home in CS, it makes it a possible item Dylan might have with him, but not a definite one. Worth mentioning in case anyone finds one in the woods.