Bingo.
But I doubt the journal's been read by LE or the PI.
Why do you doubt it? Seems it would be pretty standard in an investigation. If they haven't, sounds like yet another dropped ball.
The LDS people I know, have booksful of journals. Notes for every day of the year, bound into Franklin Institute cases. Kind of like diaries, but preserved for future generations. Kind of like a daily scrapbook.
Wouldn't SK actually have left behind many of them?
Is that the norm for LDS folks? Seems there would be more than one, in any case.