Here is a link to a page of mine showing all the different types of "a's/A's" made on the 1st. & 2nd. pages of the Ransom Note:

http://b.heart.50megs.com/ramsey/Rn1a.htm

For me, this clearly shows an author who is trying to disguise their printing style. Which of the 6 or more types is the real style of the penman? I think it also should be obvious to everyone that neither the parents or a disorganized perp would/could take the time to write out this note after the crime-the most obvious item to notice would be that it was far safer to not write anything at all.

This is just the a's. My guess is that there are many other types for the various other characters represented in the note. All of which speak to premeditated murder and that the perp had an axe to grind and an agenda to promote through a carefully crafted "ransom note".

It also shows why there can be many other people who show some similarities or "matches". There is a little bit of everything here.