Criminologist Believes Violent Behavior Is Biological (Terry Gross, Fresh Air)

Adrian Raine was the first person to conduct a brain imaging study on murderers and has since continued to study the brains of violent criminals and psychopaths. His research has convinced him that while there is a social and environmental element to violent behavior, there's another side of the coin, and that side is biology...

Interview:
http://www.npr.org/2014/03/21/292375166/criminologist-believes-violent-behavior-is-biological