(a) When a public official or reporter claims the privilege in a cause being heard before the supreme court or a superior court of this state, a person who has the right to question the public official or reporter in that proceeding, or the court on its own motion, may challenge the claim of privilege. The court shall make or cause to be made whatever inquiry the court thinks necessary to a determination of the issue. The inquiry may be made instanter by way of questions put to the witness claiming the privilege and a decision then rendered, or the court may require the presence of other witnesses or documentary showing or may order a special hearing for the determination of the issue of privilege.
(b) The court may deny the privilege and may order the public official or the reporter to testify, imposing whatever limits upon the testimony and upon the right of cross-examination of the witness as may be in the public interest or in the interest of a fair trial, if it finds the withholding of the testimony would
(1) result in a miscarriage of justice or the denial of a fair trial to those who challenge the privilege; or
(2) be contrary to the public interest.