A Supreme Court judge has stressed that it is for the courts, rather than the Executive, to decide whether State documents should be withheld from legal proceedings on public-interest grounds.
Mr Justice Francis D Murphy made the observations in proceedings brought by John McDonald against Radio Telefís Éireann, with Patrick Culligan and Michael P Staunton as notice parties. He agreed with a separate judgment of Mrs Justice McGuinness and with the order she proposed.
The issue discussed in Mr Justice Murphy’s judgment concerned a conflict between two interests: preserving the confidentiality of documents connected with the State’s executive functions, and ensuring that an individual can obtain a fair hearing.
He said earlier Supreme Court authority established that this balance must be struck by the judicial branch. In many cases, judges can do that by privately examining documents listed in discovery for which public-interest immunity is claimed.
However, Mr Justice Murphy cautioned that direct inspection is not the only available method and may sometimes be inadequate. A document might have significance that is not apparent from its wording alone. Equally, disclosure of an apparently innocuous file could reveal something sensitive about the extent of information available to investigators.
He referred specifically to an objection concerning papers described as the "Oliver File". It had been argued that producing the entire file might disclose limitations in the information available to gardaí during an ongoing investigation. A judge simply reading the documents without context might not identify that risk.
The court can therefore decide a privilege claim using other evidence, including an accepted description of the nature and contents of documents or, in an appropriate case, evidence from a senior member of the Executive.
In this case, Mr Justice Murphy said the judges had examined the disputed documents with the benefit of detailed information and legal argument. He was satisfied that document inspection was an appropriate way to determine the issue here, while warning that it would not necessarily be appropriate in every case.