"And I took a look at my own PET scan and saw something disturbing that I did not talk about," he says.
What he didn't want to reveal was that his orbital cortex looks inactive.
"If you look at the PET scan, I look just like one of those killers."
http://www.npr.org/templates/story/story.php?storyId=127888976
-- "Hige sceal þe heardra, heorte þe cenre, mod sceal þe mare, þe ure mægen lytlað."