New Horizons in Science

Prosecutors, judges, and police would like to know which psychopathic criminals are likely to repeat their crimes if released and which are not. Kent Kiehl has wheeled his tractor-trailer sized mobile MRI scanner to prisons, where he has done more than 1,000 scans of inmates in the past year that's 10 times the number of such scans of psychopaths ever done. Kiehl will share with us what he's learned.