Andy, I agree with what your saying that neither you or I are equipped with the full facts of the case, and iam sure that the driver has nothing but remorse for what has happened and has to live with the tragic events for the rest of his life.
Upon reading this article, it brought memorys for me of when i used to cycle on the road and was knocked off when an hgv's wing mirror hit my head as he overtoke me and drove off, not that my experance has any comparison to what happened here, but i hope you can understand why i was so upset.
Martin