Section 784. Use of police records

All police records relating to the
  arrest and disposition of any person under this article shall be kept in
  files separate and apart  from  the  arrests  of  adults  and  shall  be
  withheld  from  public  inspection,  but  such  records shall be open to
  inspection upon good cause shown by the parent, guardian, next friend or
  attorney of that person upon the written order of a judge of the  family
  court  in  the  county  in which the order was made or, if the person is
  subsequently convicted of a crime, of a judge of the court in  which  he
  was convicted.