I am wondering if Dylan's arrest is not a move to bring documented evidence into the case to explain why he knew things all this time yet did not report it and followed direction from his brother. IIRC JA claimed that the brothers "hated" each other. I believe featured coming attractions will be the defense explaining away Dylan's motive to "snitch" on his brother for a free pass. By his being arrested it helps to reduce the "snitch" factor and shows the DA will charge ALL those involved in any way.
IMO the arrest of Dylan is being extremely "overthought" and (in this forum) made into something it isn't, and to some extent LE is complicit, as they've worked hard to spin something relatively minor into a huge development, when it's not.
From the arrest doc, we see that
1 Dylan's arrest was based on what he told an agent on 9/17 ...
2 ...which explains the basis for their allegation of what and when Dylan did this
3 ...and further shows this arrest was NOT the product of some vigorous detective work
4 Dylan's arrest was for actions specifically on the day Holly was abducted
5 ...the crime being the act of throwing away something he shouldn't have discarded
6 ...which means that, unless she was killed and her body dumped by the cell tower on that day, this arrest has nothing to do with the discovery of her remains or something occurring when her body was discarded there
7 Dylan's arrest does not have pertain to him being involved in any of the abduction or disposal of the body
8 Dylan had previously provided voluntary testimony that he had seen her alive and in the custody of ZA after her abduction ...
9 ...his cooperation was further attested by his mother's recent statement
10 ...and he was again talking with LE and providing info, when he was arrested for doing so
11 ...so this arrest had no purpose to get him to testify, and it's somewhat baffling to see such a relatively minor act getting a cooperating witness arrested
12 I can see LE possibly doing this to make him appear to be prosecuted, rather than cooperating, except that putting him in prison (where he might be in danger for his cooperation with LE) feels really odd
13 LE has made a big deal about this arrest showing their diligence, showing how they are rounding up people involved, and blah blah blah, except
- a - they don't actually think he perpetrated any of the major crimes, and
- b - they arrested him for simply putting a used shovel or tarp or bedspread or something in the trash on that very first day without having any other involvement in what was happening.