I think the fear of that happening is the very reason the parents aren't being more cooperative. I have a feeling LE threatened this and that's why DB & JI dont trust them. Even if they arrested DB, they'd have to show that JI is unfit also in order to remove them. How traumatic would that be ? They've just lost their baby sister, now they should be ripped away from their parents too ?
Judges routinely order emergency removals first and then hold a hearing. The safety and welfare of the children is the priority. Guilty people usually don't trust LE.
JMO