It seems this was another guy who was "off his meds".

http://ap.google.com/article/ALeqM5i72zWlWRLvc1ejGI5WpefItEjKCAD8UQRPIO0

Almost every single one of these types of incidents are committed by people taking some form of psychotropic medication.

There is obviously a direct correlation with the rise in the number of these types of incidents in recent years to the rise in the number of people within the population being prescribed various forms of psychotropic drugs.

It's time society take a serious look at this instead of crying about gun laws every time something like this occurs.