It's how you study gross anatomy. We don't practice dentistry on cadavers (though we do practice root canals on extracted teeth). You take a bunch of practical exams and you go station to station with nerves, vessels, muscles, and other anatomical structures tagged.
He died before he hit the ground. I'm assuming they didn't move the body for a few hours.
Our professor was a pathologist and she thought the case was interesting. It probably violated some arbitrary government laws, but that happens often.