[Dysart]

First I'll remind you that we don't know what his mental condition has been determined to be, because it has been made by someone qualified to do so. (It ain't either of us)

However, I understand that psychopathy is thought to be genetic, but it doesn't preclude external influences on said nut. That's where you're going wrong here.

[discostu]

No actually we do. He killed a bunch of people in a spree/ mass killing style. That means there’s a problem with the meat of his brain. Probably sociopath, maybe psychopath, but it’s the meat that’s busted. And since it’s the meat that’s busted it indeed DOES preclude external influences. That’s where you’re going wrong here.