He should take responsibility for his actions. By his negligence a person died, not premeditated, but negligent. If the turn marshal was your friend or relative, then what? That's why they have different degrees of homicide.
Yes, but a premeditated act that results in death or serious injury ticks a whole lot more boxes in the psychological department, trust me.
When I try to explain my own experiences regarding this type of situation, many people almost instinctively want to diminish the impact (on their own psyche,) by commenting "oh, so you were just in the wrong place at the wrong time then." They seem to very much want to understand this type of act by dismissing it as an 'unhappy accident', which somehow makes it easier to deal with.
Problem with that is, it doesn't make it easier for me to deal with. I would have to say, hand on heart, that this is pretty much a 100% experience whenever it comes up.
I suppose I am making a 'victim statement' here, and really, that is all I have to add to this tragic affair.