Just caught up with this one.
In my experience, some 210N models have the fuel tanks selected on BOTH when the selector points to the prop. However, other 210N have the fuel tanks selected to OFF when the selector points to the prop. A very nasty little trap for young players, or pilots in a rush, and one I have very nearly been caught by.
I note the time of accident was mid-day-ish, and I understand in a C210 it's only about a 90 minute flight from Inverell to Brisbane (which I think I read is where it was headed).
Somewhere, I think I read that the owner had only had the aircraft since Sept 2012 but I don't know how much experience the pilot had on type.
Could it be - and this is pure speculation - in the background was....Please, Dr, just before you leave can you please just check on .......Honey, we need to get going. Don't forget I've arranged to meet X & Y at 5, and you wanted to see Bill Bloggs at 4......D-a-a-a-d, you PROMISED I could....
A terrible tragedy, whichever way we look at it.