From the outset there seems to have been a lot of uncertainty over the evidence presented and a lot of discrediting.
If it does turn out to be the management lumping blame on the nurse to cover their own failings, it would explain her going off the rails with things like those notes, and it certainly wouldn't be the first time a nurse has been made a scapegoat for such departmental shortcomings. Likely not the last, either, and I've personally known several nurses to whom it happened, which is what has me wondering about the 'evidence' in this case.
Even if she's completely exonerated, though, she'll possibly never work again. No healthcare place would take her anyway, and most other industries would likley refuse her based on reputation from the high profile court case.