This sort of reminds me of that Law and Order SVU episode dealing with a shrink whose son is killed by another boy.
[spoiler]Doctor: “I agree, sociopathy cannot be diagnosed in a child. Everyone knows that. I know that.”
…
Doctor shoots kid in cold blood.
…
Doctor: "Well, I had to kill him, he was a sociopath. And I got away with to! I even get to the tell the DA straight to her face directly after the trial that I am in fact guilty of the crime I was just aquitted of, including lying under oath! And for some reason, there’s nothing she can do about it because apparently neither perjury charges nor civil cases consistently exist in the Law and Order universe!
[/spoiler]
Here’s the thing, though. You CAN’T diagnose sociopathy in children in most cases because there are too many other things that can cause the apparent symptoms at that point. Children NATURALLY have somewhat shallow understandings of social norms compared to adults (that’s why we treat their bad acts differently in the first place), and they naturally have a much less developed sense of themselves and other people. They are more reactive and less reflective. And there are also any number of personality disorders that can for a time confuse the issue.
Of course, once a child who otherwise seems to have many of the major signs of sociopathy actually kills or tortures a human being, all that uncertainty begins to drop away.
There is also a big big difference between people that are lazy and lying and people that are sociopaths. Lazy lying brother in laws are often just that: selfish and lazy. But in their heart of hearts, they still care about other people, they just don’t put much effort into doing anything about it. They often even know that they are cads, and hate themselves for it, but still also lack the ability to change. Autistic people, likewise, may seem to lack the ability to make emotional connection or intuit the feelings of others, but their focus is often at worse only anti-social in the sense that they don’t want to socialize because its too troubling and difficult, not because they lack the ability to respect or appreciate the existence of others.
Sociopaths are different. They can be functional, they often have no problem engaging in the social world, and you can befriend them. But they truly are “empty” in the sense that most of them feel the world is shallow and empty, paper-thin. They certainly have no shame other than “I was stupid and got found out.”