(a)  In any case where a court shall have obtained jurisdiction of a juvenile having attained the age of seventeen (17) years pursuant to 2007 P.L. 73, Article 22, section 1:

(i)  All police records relating to the arrest, detention, apprehension and disposition of the juvenile and all records of identification maintained pursuant to chapter 12-1 of the general laws shall be treated as family court records in accordance with § 14-1-64 and § 38-2-2 of the general laws; provided, however, that no person and no department, agency or any other instrumentality of the state or of any subdivision thereof shall be held liable or otherwise legally accountable for having disclosed or disseminated any such records in reasonable reliance upon the law in effect between July 1, 2007, and the effective date of this act [November 8, 2007]; and provided further that nothing in this section shall be deemed to prohibit the use of witness statements and other police records in the course of judicial proceedings initiated prior to the effective date of this act; and

(ii)  All court records of such proceedings shall be sealed upon final disposition of the case in the event of a no information, dismissal or not guilty finding or upon the completion of any sentence, probation and/or parole imposed therein.