I disagree in part. After years of research and reading psych evals (work related), it appears to me that some people are indeed born with more of a propensity for this behavior. Their brain scans look a certain way even if they don't have a history of evil behavior. (There's a good documentary about a researcher who discovered he has a sociopathic-type brain himself).
However, there are invariably "triggers" in the lives of the ones who indeed become psychopathic and commit horrendous crimes. Research shows that is typically some combination of abuse/neglect, heavy on the emotional abuse or brutal/humiliating physical abuse sides, and things like head injury.
I recognize the unmistakable signs of personality disorder in the mother's mercy letter to the court, here. She alternately casts her son as a villain, from infancy, who she fears and cannot control, to a misunderstood "good boy", downplaying his past psych involvement and screeching in all caps about what a wonderful boy he was because after he kidnapped and raped her at gunpoint, "HE WALKED HER HOME. HE EVEN WALKED HER HOME." Gross.
Also, he fits the pattern with the classic absentee father, who actually agreed to give him up for adoption. And a bad relationship with his stepfather. I have a feeling their will be more reports of brutality he encountered at the hands of father figures.
Frankly, I have never seen one serial killer not come from a dysfunctional family or have trauma, abuse or neglect in their backgrounds. I don't believe in bad seeds. I think some have wiring issues that may lead to a greater chance of becoming deranged, but IMO, there is always a strong trigger, usually family based.
One caveat - I think there are children who have "conduct disorders" or attachment disorders that differ from the profiles of people like this monster. I think those are more common - uncontrollable rage, inability to self-regulate, socialization issues. You do see their parents in support groups or on tv shows like Dr. Phil talking about how they fear their kid is going to harm someone,. and they seem to be trying hard to fix the issues. Those types, if they don't get help, are prone to things like domestic violence, violent robberies or fights, and random murders, as opposed to serial killings. They lack the sophistication and ability to adapt and manipulate others. They just usually end up in prison early and often. They aren't able to hide in plain sight.
I still think there is a parenting/environmental "nurture" component in those kids as well, but it seems they don;t have to be victims of abuse, neglect or have personality disordered parents. There might be a more purely organic component affecting those kids. But I think this monster is something different, something worse than that.