(A picture of Carol's son Josh holding Marv when we was a puppy.
No reference to being a psychopath!)
I recently saw a very intriguing episode on AC360. Anderson Cooper's guest was James Fallon a neuroscientist who's spent his career studying psychopaths and observing their character traits. He also examines their brains through brain scans. James Fallon is the author of The Psychopath Inside: A Neuroscientist's Personal Journey into the Dark Side of the Brain.
Here's the show I watched.
Video: Many presidents had psychopathic traits?
James Fallon found out through a brain scan of his own brain that he also has the brain of a psychopath. What really got my attention is when Anderson asked him why he thought he didn't turn out to be a serial killer.