Why would DM and MS not elect a trial judged by judge alone, on the same grounds, then?
It could be that CN is going to enter a plea and there is no good reason to elect a jury.
If she was going to plead guilty, I think she would have accepted a plea deal by now JMO. I think her lawyer may have suggested to go with a judge only and I think he may have made reference to a tainted jury pool. Also society these days tends to go with whatever media tells them, rather than think for themselves, and she may not like that idea. Choosing to take her chances that a judge may the best solution.
For all we know DM and MS may have no problem with a DI. Maybe they feel safer not having certain things put out there at this point for protection purposes. Just a guess, but we don't know for sure what they are thinking. JMO