His colleagues at the '' Sunday World '' ( particularly Jim Campbell , who was also attacked in an assassination attempt by loyalist paramilitaries ) , and the NUJ continue to criticise police and prosecutors in Northern Ireland for the absence to date of any murder convictions . On 6 April 2008 the '' Sunday World '' published an article naming Robin King as the killer , and asked why the Police Service of Northern Ireland ( PSNI ) had not arrested and charged him with the murder . In the same issue the newspaper ran a story on the unveiling of a plaque in memory of O'Hagan at Belfast 's Linenhall Library . The '' Sunday World '' has run a series of articles which have " targeted the O'Hagan suspects with an extremely accurate weekly account of their activities . " The NUJ has discovered that O'Hagan 's journalistic notes , written in a personalised and initially undecipherable shorthand , have been partially decoded by the PSNI , who are examining them in connection with the Omagh bombing
Omagh bombing
Omagh bombing
Martin O'Hagan