Extremely extremely unlikely. If he is on deferred, technically he can be re-pled. But with these facts, I honestly don't see it happening.
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He is facing a probation revocation on his original charge. If that was a "straight probation" sentence, he has already been convicted of the felony offense. He should definitely contact an attorney to have a detailed discussion of his case immediately.
May I suggest that you all quit trying to do serious legal tactics and strategy as a do it yourself project. This situation calls for the assistance of a reputable criminal defense lawyer.
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