I've always found it weird that the police cannot name them, but they can give out clues, even clues that are, to all intents and purposes, naming them.
There was like "submarine expert number 2, name redacted" and in expert 2's testimony he said something like "you may recall from my film, Titanic, that..." and I mean it could be anyone or maybe is definitely James Cameron
It seems much more likely that they had identified them, but they hadn't gone through the full set of procedures (notifying family members, etc.) that are required before officially releasing names.
In any case, tragically, their daughter lived across the street and found them.