Will Graham is an interesting one. I remember how surprised I was to start watching the show and hear an Asperger's reference less than ten minutes in. His disregard for shallow social graces and his dislike of eye contact - from memory, he found it an unnecessary distraction, and did not think that the eyes were "the windows to the soul - does certainly point AS, but he didn't say that he had it, he said that out of psychopathy and autism, he was closer to autism. Later on it seemed to me that his psychological profile was quite the opposite to AS: he had an unusual abundance of "mirror neurons", which you're only supposed to have as a child, which is why he could absorb the thoughts, feelings and actions of the killers he was helping to catch. Aspies are believed to have an unusually low number mirror neurons, which is why their vocal and physical communication is do different. Generally, when NT children observe an adult smiling, they smile back, but aspies tend to just think "oh, that's nice" and are not particularly motivated to copy it.