Didn't we already know this after a few days/weeks of the accident? The kind of analysis here might be new, but is it actually providing more data? And is it

Didn't we already know this after a few days/weeks of the accident? The kind of analysis here might be new, but is it actually providing more data? And is it possible that the accuracy of this method has been improved by the developer knowing what the correct answer needed to be beforehand?