Counterpoint: This does not match my experience with PhDs*. The vast majority have been personable, humble, and lead balanced lives. I am not saying my experience is more representative, only that I think such stereotypes are unhelpful.I say this because I worked at a prestigious university and on a daily basis came into contact with the doctoral students, besides having dated 3 or 4 of them, they were for the most part extremely socially awkward and emotionally blank upon meeting, but make no mistake - intellectually arrogant, aloof, and considered themselves intellectually superior to most everyone. Imo this suspect is going to try to outwit everyone at every step along the way - because that was his MO during his lifetime, his great control over his intellectual and academic prowess. I think he was praised for his intellect by family and those who knew him - but also a great intelligence in one area of a person's development that a person can get attention for can overshadow a lacking in another area - think emotional intelligence - that they need help developing - there is a theory of multiple intelligences that posits this - worth a look!
* predominantly hard sciences