Still Why We Sleep, just got to a part that made me think of Matt and that dreadful day.
Basically, the author shows how driving while sleep deprived is as bad or worse than driving inebriated, because there isn’t as much of a stigma against driving while tired. Impaired judgment is still impaired judgement, no matter the cause. And as I’ve always said, when your judgment is impaired, your judgment as to whether or not your judgment is impaired is impaired.
From what little I know of what happened, it sure sounds like sleep deprivation may have been a large factor.