mmmscience writes "A group of scientists has identified a structure in the brain of psychopaths that is abnormal when compared with controls. The change is found in the uncinate fasciculus, a bridge of white matter that connects the amygdala (emotion/aggression brain region) and the orbitofrontal cortex (decision making region). Interestingly, the greater the abnormality in the region, the more severe the levels of sociopathy in a subject. The results were published as 'Altered connections on the road to psychopathy' in the journal Molecular Psychiatry. A researcher on the team suggests the finding could have considerable implications in the world of criminal justice, where such scans could one day be presented as evidence in a trial."
The study's results have not yet been replicated by other researchers.