Criminals! lol. Nah, I mean in general, all the experience you'd have from studying psychology would help if you were to transition into something like law. I've never taken a single course on psychology so I'm really no expert, but I do know that the skills that one would acquire from it really help in reading people. If you were a prosecutor for example, I'm sure you could take a look at the evidence and draw reasonable conclusions about why someone committed a certain act, based in part on psychological reasoning.