I think the suspicion was/is that she shouldn't have been driving. She claimed the fit was a one off, first ever, but that may not have been true.
Also the HT at the school claimed they were never interviewed and felt that had evidence to offer, although I don't know what that could be.
For me, I don't know why it didn't open a much bigger discussion about the size and power of SUVs, because that was a monster, and whilst being hit by any car can be devastating, I suspect a smaller, less powerful vehicle would never have breached the fence.
But yes, also rich and well connected and very good lawyers.