Non-lawyer but...
If a jury comes to a conclusion then the defendant is not guilty then it's game over. A mistrial had to be called before deliberation happen, and that would have to have some material misconduct during the trial, not just 'I think we gonna lose'. A guilty verdict could be appealed but that appeal is only to decide if the case was conducted fairly (for a retrial request) or to assess the validity of a sentence.
Basing it off some time I did a lot of legal/court adjacent work for a few years, but I'm pretty sure that's right.
You think the company doesn't have the ability to curate the notes allowed by the community or to farm their own? It's always possible for a site owner to shape the messages on the site, even if it comes to a point of direct database manipulation.