Nope, I wouldn't ignore the question, I'd just leave it to other members of the CSI team. And I wouldn;t completely discount the possibility that the trigger was pulled in some sort of strange evidence that it was not an accident.
Besides, we could go ahead and track down the owner of the gun, but if it was another gun that shot the victim, it would be a lot of time wasted.
And what was the point of wasting the students' time with any of this?