Getting the thread back on topic, if that's even possible in this place . . .

So the dad bought a .45 and magazines and gave them to his son Dylan for his 21st birthday. And within what, days?, he goes into a church and kills 9 people. I gotta' wonder what life training, if any, prior to the 21st birthday might have occurred with this kid. Was this random craziness, or in any way a predictable outcome?