Brain injury or damage is being increasingly linked to this sort of violence.
If AS's father was a drug user then it is possible that his DNA was damaged before he was even conceived.
We may be seeing an increase in violent children because of damaged genetic material inherited from drug using parents of either sex.
AS may be another Alyssa Bustamante - just wanted to find out how it felt.
The wiring is wrong, and has been wrong since they came out of the womb...perhaps before they were even concieved. They just don't think like normal people, and perhaps it's because they physically can't.
Who is to blame if damaged DNA this is the cause of their deficiencies?
We need more research into the potential generational effects of long term drug abuse.
Sort of O/T
Damage is done from the water we drink and shower in due to the chemicals, chlorine and fluoride in the U.S. to start with, much less older pipes, plumbing, inability to filter. Look up local water sources, scary.
Damage is done from our food sources (natural and processed), water chemicals again, and whatever is left in the soil from years gone by.
Damage is done from years of genetics, not going to elaborate on the history of humans, much less countries.
Major damage from pharmaceuticals, hasn't stopped yet, never will.
I could go on. The point is, it will continue.
But, these things happened even before modern society. Read any religion's books, read any science old, read any philosophy, read any psychology (yes, still a young "science"). Read anything of centuries ago, you will find a "Marquis de Sade", even from the first print, handed down tales of Nordics, Indians, cavemen. Now I am waxing poetic and need to stop.
ETA: Point being, we are still simply animals, classified as mammals, and murder has always been there. Watch a momma cat bring her kitten a mouse and teach it to kill. Some just live on that wire, not the God fearing lessons to stop us.