David Bain has been denied access to documents linked to a report into compensation for wrongful imprisonment.
His legal team had applied for access to 250 documents that Justice Minister Judith Collins had received over Mr Bain's compensation claim.
The Crown had refused to release the bulk of the documents, saying they are highly privileged.
In a decision by the High Court, released this afternoon (Wed), Justice Patrick Keane ruled most of those documents should not be released.
Mr Bain's lawyer Michael Reed QC earlier alleged the documents had been merely "drip-fed'' to his legal team.