Where evil lurks: Neurologist discovers 'dark patch' inside the brains of killers and rapists

A German neurologist claims to have found the area of the brain where evil lurks in killers, rapists and robbers.  

Bremen scientist Dr Gerhard Roth says the 'evil patch' lies in the brain's central lobe and shows up as a dark mass on X-rays.

He discovered it when investigating violent convicted offenders over the years for German government studies.