OK, great. We know, after the fact, all the things that we think led up to his behavior.
Wonderful job of finding the dots after the fact.
Perhaps this information, along with the stuff we got on the University of Alabama killer, the Ft. Hood killer, and the Va Tech killer, and the Oklahoma City bomber, and the Unabomber, and Benedict Arnold, will help explain stuff. But it does not seem to be able to be used in a way that can predict or prevent stuff from happening.
What I really want to know is who is out there seeing some dots lining up? Can we ever get past individual situational awareness and response to immediate situations to the point of appropriately (whatever that word comes to mean)dealing with the uncertainties of the human mind? Do we want to go that far? There's so great si-fi out there about executing kids who are predicted to grow up to become evil emperors.
Otherwise, this profiling of dead killers is merely a mental exercise.