An interesting article.

 

Abstract :

A Secret Service agent recently asked if I was familiar with a 1992 FBI report that almost half of the killers of law enforcement officers met the criteria for antisocial personality. I replied that I had not seen the report but that the finding did not seem surprising or noteworthy to me. My comment was based on the assumption that the report had used antisocial personality as a synonym for antisocial personality disorder (ASPD), a category listed in the fourth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) and applicable to the majority of criminals.
However, the agent explained that the description of the killers in question indicated to him that they matched the profile of the psychopath defined by the Psychopathy Checklist-Revised (Hare 1991). When I later saw a copy of the FBI report, I realized that he was correct in his assessment and that the report’s findings were indeed noteworthy and chilling, particularly for law enforcement officers.

 

Source:

http://www.psychiatrictimes.com/antisocial-personality-disorder/psychopathy-and-antisocial-personality-disorder-case-diagnostic-confusion