Dr Ian Paisley said last night said his interview with the RUC serious crime squad regarding the authenticity of police documents in his possession had lasted for "approximately three and a half minutes".
Dr Paisley was questioned about documents from which he named 20 men he alleged were behind the 1976 Kingsmill Massacre in the House of Commons last month.
The RUC Chief Constable, Sir Ronnie Flanagan, has denied that the documents are official police documents.