Not guilty sets no legal precedent. For that, he needs to be found giulty at trial (no plea bargains) appeal that conviction, and then have an appelate court declare that a mistake was made. I would not wish such a process on anyone.
A precedent is set every time an issue is judged for the first time. If you have any prior case of someone being found guilty or not for this exact case, that would be the precedent. If there is none, then this will set it, including appeal results.
Those are interesting precedents, not the binding ones that count and other courts must follow.