Probation Revocation - Help Please

[Pepperlea]

I my son plead guilty to drug charges in 2010 and was given non-adjudicated sentence pending completion of RID program at WGYCF and 5 years of probation. After getting home in July he was doing really great, enrolled in school full time, working, etc. Really trying hard to keep himself straight. He started hanging out with a few of his old "friends" for a very short time and quickly realized that this wasn't a road he wanted to go back down.
In late December, we get a knock on the door from pd with a warrant for my son's arrest on charges of auto burglary. As it turns out, this warrant was issued based on the written statement by one of these "friends". Two days prior to the warrant being issued for my son, this friend was arrested on drug charges. Since he was already on parole for auto burglary, he was looking at revocation and additional time for new charges. I have no doubts he wrote the statement in hopes of saving himself and possible leniency. The problem is that this statement is a total fabrication and there is absolutely no physical proof that my son was involved in any way.
Now what we are facing is a possibility of adjudication of a sentence and probation revocation. I am confident that the new charges cant be proven and some have already been dropped. Our biggest concern is that Mississippi revocation law says that he doesn't have to be found guilty of committing a crime, just that it might be likely that he did.
Anyone have any advice or suggestions on how we can try and get this situation resolved without having his probation revoked and him sentenced to serve time?
BTW, he's been in county jail for over 150 days now, waiting on action from the state.