Any person who has been found guilty under section 17-379 or any statute predecessor thereto, if she has been convicted of no other offense prior to her twenty-first birthday, may file a petition with the court by which she was found guilty, or, if such finding was by a trial justice or municipal court or the Circuit Court, to the Office of the Chief Court Administrator for an order of erasure, and such court shall thereupon order all police and court records and records of the state’s or prosecuting attorney pertaining to such case to be erased.