What can we do to help people that have psychopathic tendencies?

                 Finding a psychopathic is very hard not only because they are very good at hiding the fact that they are psychopaths but also because  most people that are psychopaths don't know that they are psychopaths themselves. Like the doctor that was studying the brains of psychopaths and if there is a difference, found out that he himself had a brain of a psychopath. But how can we help these people so that they don't cause any harm to themselves or other people. We see that people who claim that are psychopaths after killing are then sent to treatments, but why are those treatments not given before a psychopath kills, and if their are programs, they are not presented so that everyone who needs them knows about them. This has really got me thinking because after we saw many case of "crazy" people and what they have done, it got me thinking what can I do to help these people not commit these horrible crimes. And the truth is that these people can be complicated because they fit in the real world like normal people. My best solution for these people is to keep them  occupied and don't let their tendencies grow into something worse, but if there is a person that doesn't want that help but really needs it then that's when we need help from the people that are closest to them to help them get the help that they need. So those are my solutions for these troubled people.