IMO,Ronald has no reason to be subjected to further interrogations by LE at this point. He has told them everything he knows, what he remembers, given them lists, taken a LDT, probably has offered his DNA, and all they have done is try to use all of that against him and his wife, imo. He tried to openly work with them without lawyering up for the longest time and so has Misty. (Did she ever get an attorney?) It doesn't sound to me like there was any lack of cooperation there at all. If either one had lawyered up immediately...I could understand why people would be up in arms about not meeting with LE. That did not happen in this case.
What could possibly be gained from them besides LE not being able to keep bashing them repeatedly in the media for "resisting" to talk? LE will only continue their assault on them for not being able to tell them what happened to Haleigh. They don't know what happened to Haleigh, imo. There is nothing left for them to say to LE!!