You would think that DCFS would be familiar with RAD and once investigating the documentation of his adoption and his medical situation, that would satisfy their concern. I hope there's nothing more to the story but it sounds like a busy body sticking her nose in where it doesn't belong. What a shame. There should be no ripping apart of the family once they see the medical info on the boy.
Since modern science isn't, why would you expect DCFS to be?