I have a feeling that " Bill " is connected to the case. He was too precise to have been just an onlooker on a forum.
Sometimes,you DO get the odd honest person who feels that they have to say something regardless of the amount of years that have gone by,because to themselves they feel a sense of relief that it's at least off their chest to speak about it,though one voice in a crowd doesn't make that much of an impact,it does give others food for thought which is why his post has been brought to the fore.