Its at the discretion of your PO, and there are a lot of variables including your compliance up to this point etc, my suggestion is that you speak with a criminal defense lawyer in your area to determine your best course of action.
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If no charges were filed, then it is up to your PO to decide whether or not to charge you with a violation. As for what will occur, that depends on negotiations between your counsel and the DA, or if none are successful, up to the judge. I've done a lot of juvenile work, and I suggest you hire a good lawyer who knows the juvenile process. Don't rely on the Public Defender. Depending on what your underlying offense was for, you could end up at Spring Mountain or even Caliente if your lawyer isn't aggressive and persuasive.