Members of a Vermont legislative committee are blasting the state's parole system for paroling a convicted murderer to serve a separate federal sentence, and then using a fabricated arrest warrant to get him back into state custody when the federal sentence was done.

Douglas Mason was serving a 15-to-30-year sentence for second-degree murder when state parole officials paroled him for purposes of serving a three-year federal prison term for threatening the judge who presided over his murder trial.