Criminal Law
Zexion will approach the case like a science experiment--through the scientific method. He'll probably do a bit of research into finding out about the actual case, if he can find it through computerized records, even with the names changed. The research is just to check his answer.

Self-Defense
He'll find this actually boring this time instead of just pretending to be bored like last time. He knows all too much about how fights start and how to avoid them. However he is paying attention.