Written communications to a state or local governmental body made within the scope of the attorney-client relationship by any attorney serving the public body concerning a claim against or on behalf of the public body or the prosecution, defense, settlement, or litigation of a judicial or administrative proceeding to which the public body is a party or by which it is or may be directly affected are not subject to public disclosure under the state’s public records law for a period of three years after the date they were received by the public body.