Just added an external link.  It is an article dealing with papers presented and interviews done at the first annual meeting of a professional society devoted to the scientifice study of psychopathy.  I see above that someone thinks the article needs work and maybe this will help someone with a Master's or PhD in psychology correctly update this article to take more of the subjective and non-verifiable, non-scientific material out of an important issue.  I am not qualified to write an article as I have only a Bachelor's in Psychology, and I am all too used to wikipedia articles being changed so often as to render them near meaningless.  But I will suggest that valuable appropriate external links are most valuable to the average reader who comes here looking for answers.  This is the first time I have ever added anything to an article - or left a comment, for that matter.  Hope this is allowed as it seemed an good way to draw immediate attention to the new link.   TD R-Turner