Here’s a paragraph from Robert Oswald’s book “Lee” that I find significant:
I still remember how completely relaxed he seemed, as though all the frenzied activity there in the Dallas jail and all over the United States had nothing whatever to do with him. His voice was calm, and he talked matter-of-factly, without any sign of tension or strain, as though we were discussing a moderately interesting incident at his office or my office.
Marina also took note of his calm demeanor, she even stated something to the effect that this was one item that indicated to her that LHO was guilty. She thought that if he was innocent, that he would be raising holy hell.
And several of the law enforcement officers, investigators, etc have also expressed the opinion that LHO seemed too calm for the circumstances.
People have tried to draw various conclusions from his calm demeanor. Of course these can only be opinions. Personally, I think that it is significant that the calm demeanor stood out as an unexpected aspect, and made a lasting impression on both Robert and Marina, two people who knew LHO well. I think that LHO knew that it was over (he reportedly said so in the Texas Theater). However, I believe that he also knew that he had made his mark on the world, and that the end result would therefore mean that he would “go down in history.” I believe that, to LHO’s troubled mind, the end result somehow justified the means. That’s how freaking sick I believe he was.