We apparently don't have fingerprints, but we have linguistics, handwriting, and DNA. Unlike fiber, they are unique signatures that can be matched to its owner, a real person. The person who murdered JBR could ultimately be identified by their DNA, handwriting, or linguistics. We've been over handwriting and DNA enough, but what about linguistics? I'm specifically looking for expressions within the ransom note that are probably personal mannerisms. Unique traits, like a signature. If it is the tendency of a person to use lines from movies, then that is one of their personal mannerisms. If it is the standard practice of someone to end their letters with the closing salutation 'Victory!' then that person is probably matching the linguistic profile of the ransom note author. Is there a linguistic profile, and if so what are its characteristics? Was this the first ransom note written by this person? Was it the last? Was this the first 3 page letter ever written by this person, or is this person an author, a journalist, or a screenwriter? Here's the main question I have: What specific expressions or linguistic profile traits apparent in the ransom note could be expected to be found in other writings by the same person?