After watching this documentary and youtube videos I made my conclusion. Guy was simply a sociopath

Simple as that. This is few definitions of Psychopathic and Sociopathic behavior. Which this guy is combination of:

- Inability to empathize with others
- Lack of conscience or remorse for actions
- Few close bonds and relationships
- Callous and emotionally detached
- Reckless or impulsive decision making
- Willing to harm/use others for personal gain
- More prone towards violence

This is the reason he showed no remorse of his actions and no sadness over death of his children. He doesnt have empathy. He never loved him. He doesnt have those feelings. He was imitating them his whole life. He understands that what he did was wrong. But he cant cry for them because he doesnt care if they suffered or gone. This is what true sociopath looks like and we were able to watch one in all details. Its scary.

The only true feeling he had in his life was when he got affection for his mistress. It blew his mind. And he wanted this to continue so he decided to get rid of his wife and children who were in a way of that. Whom he never loved and cared about. And he killed them with such ease. No remorse, nothing. He sits there in court and all those people shame him and want to see him crying and be remorseful. But he feels nothing inside. He cant cry. He is not ashamed. He doesnt care if they are gone.

And then he sits in prison and hopes that his mistress will write him because that affection toward her is the only feeling he feels.

All those people said he was always quiet and emotionless. And we see that in home videos. And even his neighbor saw that immediately and told cops that something was wrong with that guy because he never behaves like that, never fussing around. That was when he tried to act being concerned for his wife’s missing. But he couldnt act those feelings because he doesnt now how. That why it all looked fake and noticeable how not caring he was.