Had to look this one up. Apparently the answer is he was a rich *hole who murdered a student, got fined £80 (which might have been a lot of money, but he was rich), stayed away from Oxford a few years and then The Powers That Be told everyone to get over it.
The fine was against multiple men. That makes me speculate the death was part of a drunkin bar fight and the victim was comnected but the King was neutral and only banned him until the King returned. Ahew, what a nest of rabbit holes to follow.
I can kind of understand the statute, tbqh.