I keep coming back to the absence of fibers. If this is a more recent burial, the lack of fibers indicates to me that the poor child was buried naked, clearly for the purpose of leaving no clues. A parent who was covering up an accident wouldn't necessarily think like that IMO. In their grief, I think they would tenderly wrap the child in a blanket, not thinking of forensics. Even a murdered child is usually found dressed. A child buried naked has been thrown away IMO. If this turns out to be DeOrr, remembering his mother clutching his blanket in the first interview...I would have no words.
JMO