The two empty shells in this photograph, which shows the boxes in the positions they were first found, appear next to the brick wall below and to the right of the open sniper's window. A third shell is blocked from view by the box on the floor at the bottom of the picture. An FBI investigator studied the ejection pattern of the Mannlicher Carcano rifle and noted that empty shells flew to the right of the weapon. Nevertheless, because the surrounding boxes and brick wall were so close to the weapon, no regular pattern could be determined because the shells would likely have hit the boxes or wall and bounced.
Copies of this photograph led to a theory that the sniper's nest window was blacked out to hide evidence of something. Actually, as can be seen in this first generation print, the walls and windows of the Dallas County Records Building are seen to be in deep shadow. Later generation copies made the dark area even darker with no apparent details, which led to the discredited theory. - Gary Mack, Curator