And even if the voice recorder is found it may not help much or at all since I believe that the recorder will only record the last two hours of a flight. I also believe that it used to be only the last 30 minutes but was lengthened to two hours.

At least if there is not any voices on it, it will provide evidence that the flight crew may have been unconscious during the last two hours of the flight.

Right now only God knows for sure.