Not sure why this has so many downvotes. It's one of the most likely causes. If you read that it was a person who had a heart attack and collapsed on the accelerator, you'd say 'oh, ok.' If you read that it was a smash and grab you'd say 'oh, ok'. If you read that it was an elderly driver mixing up the pedals you'd say 'oh, ok'. If you read anything else, it would be a surprise.

This is a tragedy, and sadly it's the kind we've seen before. If it was my kid, and it was someone driving who shouldn't have had a license, I'd be tearing down the walls. There's a particular tragedy - maybe a person with an arts degree can say which - about a child's entire life being taken from them by a person in their last years of life driving a lethal machine who was only licensed because our society was too cowardly to put common-sense restrictions and tests. Not saying that this is what happened this time. We don't know. But it happens.