Has it occured to you that most of these kids probably won't talk to the investigators at all right now? That does not mean they can't identify their parents it simply means they won't for the very solid reason that the kids who are old enough realize that their parents mightbe prosecuted with such information. It's also likely that the kids lawyers are telling the kids not to talk about certain things with the investigators, as any decent lawyer would.
Recall when Bill Clinton's mother fled a similar situation in Hope ~
No wonder Billzo's going nuts this last week. Can you imagine the anguish this puts the man through.