I heard it also mentioned by one of the professionals that the curly end of the comma was significant, but I don't think it is. The problem with the documents doesn't, fortunately, just hinge on one or two factors.
I can remember that our high school secretary got one of these impressive IBM electric typewriter--with the ball! Cadillac! Imagine that! Kids would even go into the office and lean over the counter to look at it. Secretaries were proud to type on it--this was when running an office was a choice career for career-minded women. Men were not good typists, generally, in my memory. Killian, I suppose, could have been the unlikely exception. But his wife scoffs.
Could Killian have had some lavishly exotic typewriter? Unlikely, but possible. I guess they were handing them out right and left to state Nat'l Guards?
The heading is suspicious. Perfectly centered--took me days in a typing class to learn this. Killian doesn't sound like the kind of anal-retentive who'd take pride in typing a header when not bothering would be just as easy.