>My name is ***** ***** I am an experienced criminal
EVen though your son's probation was transferred to Florida, the original judge who sentenced him to probation would be the judge before your son would come on a hearing for the violation of his probation. So as a general rule, you can expect him to be extradited to Virginia to face the judge and the prosecutor handling his case.
Typically, if there is nothing other than the Viginia violation of probation keeping your son in jail in Florida, such as a new case, Virgina would get 30 days to come get him, starting from when your son signed the extradition waiver and agreed to return to Virginia. That's because there's a Federal Act called the Uniform Extradition Act that says that 30 days is a reasonable amount of time for an extradition to be completed.
States are free to make their own modifications and are not bound by the Act, but because the Federal Law says that 30 days is reasonable and Federal trumps state, there isn't much one can do about a delay until after 30 days are up. Then, if there is still no movement on the part of Virginia, your son's lawyer can bring a writ of habeas corpus to get him before the judge so that Florida could show good cause as to why he was still being detained and, if the state couldn't, release him.
Usually judges keep close watch on extradition cases since these defendants can easily fall through the cracks of the system if there is no other case they are being held for. Your son probably has a lawyer or a public defender assigned to him in Florida who you can contact and make sure there's no undue delay.
He should have a lawyer on the Virginia end, as that is where the violation will be contested, and that can make a difference as to whether he will be restored to probation, where he'll be allowed to finish his probation, or whether he'll be resentenced to prison and how much. If he's eligible for a public defender, he should be assigned one when he comes before the judge. If he can afford private counsel, he's not eligible for a free lawyer.