Exactly, but what can be done with such people? They can't be locked up. We just wait until they kill others then say, "Yes, he had some mental health issues ... "
Depending on whether an objective evaluation can be made, they can at least be red-flagged for firearms purchases, and perhaps required to submit to some counseling.
Unfortunately, once a person becomes a full-fledged psychopath, there is not a lot of hope for "curing" them of it.
Psychopaths can be fairly consistently identified - in fact, I believe there is even research that is finding that there are organic differences in the brains of psychopaths - and I don't think a simple "just wait and see" response is adequate. Yes, it does bring up issues with Minority Report dimensions, but the bottom line remains that psychopaths are generally a long-term danger to society.
