Man missing after diving accident

[ranger979]

I don't understand the 'mystery' about how a weighted diver can drift three miles down stream, however.  I would assume he was weighted to be neutrally bouyant which to me would be ideal for drifting down stream.  I'm not sure if it is because the writer doesn't know anything about diving or if there is more to the story that they haven't said, perhaps he was intentionally overweighted.