Karr might be one of those who give initials TWO MEANINGS. I did it when I was young but it was for memorization purposes...kinda like the sine, cosine, tan ditty.
From the note, lets say SBTC means what we perceive from the yearbook-"Shall Be The Conqueror".
Bring it more up to date...to the Fall of 1996. Karr went to Bevill State Community College from November to February. Lets look at the possibility: Student, Bevill, Teacher, College...or maybe....Student, Bevill, Teacher, Conquer.
I have to go back and look. But there's a familiarity with this pattern and the Unabomber who I believe was caught just before this. And Karr wrote a book...same pattern as the Unabomber?....Karr's manifest??
And it was the Unabomber's brother who recognized a "phrase" from their youth while reading the manifest. I thimnk that's to come.
Interesting eh? ;)