Yep! Random murderers are not concerned with a persons journal. If it is always there and then it isn't, I think it's relevant. The things that are missing are her phone AND charger, her journal, and her. So she ran away with her phone and charger, but never used them again? Took her journal, but not her purse. Staged her bike and helmet somehow.. maybe she hitchhiked and tossed it out the window. Every scenario for the missing things just doesn't equal a random abduction. Her girls knew she had a journal, but Barry "didn't even know she had one"
Every single one of these little things that could possibly be explained away, can't just be taken out of the equation. There are way to many of them. If it were one or two things that could be coincidence or just unexplained sure maybe that would be silly to introduce them, but there are SO MANY here and they all can't just be coincidence. It all leads to Barry. All of it. It is evidence that will hold up in court. It is powerful when presented all together. His behavior, the missing items, her lack of communication, her powerful words via text and those recordings. She is speaking loudly and so is Barry.