Read closer. The records held by the police were ordered destroyed after they were already turned over. A juvenile judge later ordered them destroyed but with no explanation as to why. Since the matter never reached a court, there is now the issue of whether the judge had the authority to order police to get rid of them.
I think it is a courtesy for a Judge to explain his order, not a requirement. I think if they had such an order from a Judge, they needed to comply with it. I can think of all sorts of conditions under which a Judge would have no interest in explaining the reasons for his order, especially as relates to juvenile incidents.