From the same book, Crossfire:
"...I looked up and Oswald was coming in the back door to the office. I met him by the time I passed my desk several feet and I told him, "Oh, the Presidents been shot, but maybe they didn't hit him." He mumbled something to me, I kept walking, he did too. I didn't pay any attention to what he said because I had no thoughts of anything of him having any connection with it all because he was very calm. He had gotten a coke and was holding it in his hands... The only time I had seen him in the office was to come and get change and he already had a coke in his hands so he didn't come for change..."
So we can conclude with relative confidence Oswald was where Baker and Truly had seen him at around the same time they had seen him. An interesting, albeit small, point is he seemingly did have the coke in his hand also - unusual since he, according to the official story, had just shot the president from the 6th floor moments before.
Anyway, there's no denying that other witnesses do report seeing a shooter still. Even those on the 5th floor claim that a man was shooting from above them. According to an official FBI report, a women called Mrs Mooneyham claimed to have even seen someone present in the snipers nest, but this was around 5 minutes after the assassination. According to Crossfire Tom Dillard, a photographer in the motorcade, had also taken an image of the depository with-in minutes after the assassination. Comparing this photo to others led an official investigation, known the HSCA investigation, to conclude: "There was an apparent rearranging of boxes within two minutes after the last shot was fired at President Kennedy."
It's also worth pointing out that no witness has ever come forward and claimed to have seen Oswald race down the building immediately after the shooting had taken place to reach the second floor. Some others also reported seeing the shooter simply looking out the window after the shooting, although at a bit of a distance. This giving Oswald even less time to reach the second floor assuming he was the culprit..
Anyway, the point of this thread is not to wholly show that Oswald was not a shooter.. which he seemingly wasn't anyway, It's to show that the shooter from this position wasn't the sole shooter. You see, as well as a great deal of scepticism coming about surrounding Oswald as a shooter, much scepticism has come about over the conclusion that all shots fired at Kennedy had come from behind him. Many, including myself, believe a shot had come from none other than the Grassy Knoll, an image of this location shown below:
The cross marking the exact location of the fatal head shot striking Kennedy.
You see, I feel the need to go back to the reasoning behind the title of this thread at this point - the smoking gun. Well, according to witnesses, a gun, or something resembling a gun wasn't solely heard to have come from the Grassy Knoll, but smoke was also said to have been seen rising from this location as well.
One of the most famous witnesses to see smoke coming from this area was Lee Bowers, Lee being situated in his rail yard tower behind the Grassy Knoll on the day of the assassination, his exact location as shown in this modern image of Dealey Plaza as seen from the air:
Here's a snippet of an interview he once conducted, prior to his mysterious death, with JFK researcher, Mark Lane:
"At the time of the shooting, in the vicinity of where the two men I have described were, there was a flash of light or, as far as I am concerned, something I could not identify, but there was something which occurred which caught my eye in this immediate area on the embankment. Now, what this was, I could not state at that time and at this time I could not identify it, other than there was some unusual occurrence - a flash of light or smoke or something which caused me to feel like something out of the ordinary had occurred there."