One who shoots a dozen people.

This man, under any circumstances, cannot be labeled as a 'disgruntled' person.  Those who labeled him that are nowhere near describing what he is, but disgruntled isn't it.  It so undermines the gravity of his mind and actions and his victims.  We must. for everyone's sake, try to do better in the description category.  A simplified label doesn't do this horrible happening or people any favors..................marge