I think now their only option would be to plead to the Supreme Court of the United States
They can appeal the decision of the Montana supreme court, failing that they can then appeal to the Supreme Court of the United States. It's not over till it's over.
I believe they can show Watchtower has paid clergy (Circuit overseer) and Service desk elders, also lawyers etc
I think the main point is that it was not a confession by the perp, but a REPORT by the family who viewed the elders very much as their clergy.
Just because it is watchtower procedure does not make it comparable with normal church confessional. Whether they argue they are clergy or not, the victim has good grounds to do so because Watchtower was indeed malicious in its intent to place it's own reputation above a child's safety.