The writing was her mood journal. It's just going to be random blurbs she felt like writing down, maybe some sketches, some fanfic she was working on. She was in the middle of a major mental health episode, so it's probably pretty disjointed. They've also got her devices, external storage, etc. If there was incitement/conspiracy that's where the evidence will be. They'll have to get all of her online information (search history, account contents, messages, telephone meta data). If others were involved, they'll need to get a warrant for all their information and archive it. Releasing the journal could spook other people into destroying evidence. We've been promised the writing. I think we'll get the unedited writing because I don't think any worthwhile evidence is in it.