When I was really struggling with poor MH, I wrote notes like this.
I know I wrote "I murdered them" referring to two babies lost in utero, one after I'd taken deliberate risks. Nothing illegal.
And I wrote "they're dead because of me", or something along those lines referring to two deaths which were in NO way my fault, but which I felt were. Along the lines of if I'd turn right instead of left, I would have died instead of them.
I have no idea if Lucy Letby is a serial murderer or a victim of terrible miscarriage of justice, but the statistics sound like they were unfairly included and presented (from one article I read), and I really doubt if those notes should have been shared with the jury.
Even before learning this about the therapists, it chilled me when I read about those notes - thank goodness I wasn't accused of a crime when my bedroom was littered with those kind of words.