Supervised release replaces parole for federal crimes committed after November 1, 1987. Like parole, supervised release is a term of restricted freedom following a defendant’s release from prison. The nature of supervision and the conditions imposed during supervised release are also similar to those that applied in the old system of parole. However, whereas parole functions in lieu of a remaining prison term, supervised release begins only after a defendant has completed his full prison sentence. Where revocation of parole could lead to a return to prison to finish out a defendant’s original sentence, revocation of supervised release can lead to a return to prison for a term in addition to that imposed for the defendant’s original sentence….