I think there are still other suspects - we just don't know who.
I still believe that an RSO could be involved. There was one very close to where Dylan was last seen. LE says all the RSOs have been checked out, but if they checked out RSOs in the same manner as the RSOs in the Lunford (I spelt that wrong) case - then it doesn't really mean much, does it?
And there could be a complete unknown that left no clues behind.
I think it is telling that LE brought up looking at the places within walking distance for Dylan. It is very likely that Dylan is very near to MR's house, if something bad happened.
I also think by throwing all our eggs into one basket, we do Dylan a disservice. And .... the case does not seem to be moving forward under that one theory. So exploring other options is not a bad idea.
JMO,
Salem
Thank you for this answer . But then that does not explain away Mark's behaviour since Dylan went missing IMO