Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

I have been saying, for years, that when Jack Ruby arrived at the basement earlier than we have been told, and Dallas Police jumped him and dragged him up to the 5th floor, the reason he accepted  it when they told him that he shot Oswald is because he was drugged, and I think this image is proof of it. He is staring blankly. His affect is totally dissociated from having just killed a man and destroyed his own life. If you look closely, you can see that his pupils were dilated. God, was he out of it. 

And I think I know what drug they gave him, scopolamine, a South American drug that the CIA learned about from the Nazis. And in South America, scopolamine has frequently been used in the commission of crimes, to get victims to cooperate. You can read about it here. I believe that this drug is the reason Ruby didn't fight it when they told him he shot Oswald. 

http://thescienceexplorer.com/brain-and-body/scopolamine-mind-control-drug-most-dangerous-world