Psychopath: Redefining Rational

Psychopaths probably make up around 20 per cent of the prison population in both the USA and Britain. They are four times more likely to re-offend than other released prisoners, yet they are just as likely to get parole. Little is known about the minds of psychopaths and what is behind the horrific things they do. Professor Robert Hare suggests looking at the brain for clues to their behavior.