Ah, forensic psychology!
Some of my peers have gone into that field, but found it wasn't all
Silence of the Lambs. They spend their days collecting data by
interviewing prisoners, and when a prisoner jumps over the table
and attacks them, they can't hit the bugger - instead they have to
wait for the guard to come in and deal with it.
Anyway, here's one:
This is a question that's been used to study serial killers:
Ann attends her aunt's funeral and meets a handsome and charming
man who she takes a real fancy to. A few weeks later she murders
her sister. Why did she do it?
Answer to come later. 
