He's sarcastic Don't try to grow a brain John....and that attitude shows up in the yearbook in (unlike your loving sister).
Then there's the words themselves....Talking about bad things that happened, Karr writes: "Blurred by my own eyes" in the yearbook.
Suwart said the suspect described the encounter as "a blur". That's a very unusual word to describe a murder scene.
Bet "blur" is a favorite word of his just like he uses exclamations much more freely than most of us would.
Wonder what the odds are on a LONG, carefully punctuated ransom note with a lot of exclamation points and "Victory" at the end.
Good observations.