It is complex. Even the investigators sounded confounded.
He is not typical. There seem to be factions of family annihilators - the types that have long histories of violence and doemstic abuse and the ones who seem totally normal but kill their families out of shame or a loss of control. Both usually also kill themselves.
He is not like either. And unlike most psychopaths who have a history of anti-social behavior, domestic violence criminal histories, drug and alcohol abuse, he has nothing. No hint of anger issues a la Patrick Frazee. No accounts of manipulative behavior.
He doesn't even register as giving people a hinky feeling like many psychopaths do. Nothing. Even AFTER watching his videos knowing he killed his family.
I think it's easy for us to say he's simply just evil. Or diagnose him with being a psychopath or narcissist or something. I keep veering back and forth. But IMO the reason this case is so astounding and the reason so many of us can't shake it and want to know more and talk more, is because he doesn't fit with a lot of patterns. There are shades of gray here.
Oh he definitely doesn't feel emotion exactly like most of us do. He isn't human in the same way the rest of us are. There is a defect. Something lacking: “It’s just weird how emotions process differently for me than everybody else.”
But there's also a lot of normalcy and typical human behavior there (or there was), that doesn't align with evil or any kind of mental health diagnosis we know of.
Just watch this. He is unaware Shanann is watching him. Watch how he interacts with and talks to his baby and how he reacts to news of a new one. I think this is all probably pretty real, which is indeed what makes him so scary: