To those who offered their thoughts on my last post above, thank you.
I didn't communicate my thoughts very well but my contribution was motivated by a slight frustration with the minutae - a half-mile here or there with regard to the last position, the finely-honed discussion on intrepreting the report and so on - clearly such discussion has meaning for others but didn't seem to be advancing what we need to understand most which is, what caused the accident. I think lomapaseo has made a good observation and suggestion. As for me, I'll adopt a more patient stance. Again, thanks for the feedback.