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.

I can kind of understand the statute, tbqh.

According to the Bank of England's inflation calculator, £80 in 1242 is worth £119,600 today.