That's what I noted too. All of this is interesting, and maybe that letter is another link to him. Surely Boulder has it on file.
Has Karr mentioned ANYWHERE in all his conversations and/or communications with anyone...JOHN RAMSEY.
The ransom note was directed totally at John.....and it was quite a spew.
The communication with Patricia.....Did he do that to make sure "HIS STORY" didn't die with her?? That raises the possibility that he knows someone who knows the John Ramsey.