Of course, I've got absolutely no way to know what was really happening, but I always try to bring up the possibility of mental illness when a topic of unusual behaviour comes up - too often it seems that the first reaction people have is to go to a moral explanation (drugs, just a bad person, etc) rather than a biochemical one. Even when mental illness is acknowledged as a factor it seems that there's often a moral judgement (in news reports etc), that the person was off meds or whatever and should have "controlled" themselves better. I don't think that's fair or useful.

I may also be at the stage of "oh look, I have a shiny new hammer, and just look at all these nails!!"