The brother of slain journalist Lasantha Wickrematunge raised concerns today as investigations into the murder remained stalled. Lasantha Wickrematunge was killed on 8 January 2009 while he was on his way to The Sunday Leader newspaper office in Ratmalana. However no one has yet been found guilty over the assassination which was linked to the Government at the time. A memorial was held at Lasantha's graveside at the Borella cemetery today. Lasantha's brother Lal said that investigations that were commenced since the Criminal Investigations Department took over have been exhaustive. It has been reported to Court that the Army Intelligence was behind the dastardly act. Others suspected of being the master minds have been named in Court. "Four persons have been killed in the cover up. Four innocents. High ranking Police Officers are suspected of tampering with evidence. This was the state of our Nation. Reconciliation and closure will not be possible without prosecution. There is no purpose in asking Who Lasantha is. The World knows who Lasantha was. His writing has proven that and will last the test of time. Let his memory live forever," Lal Wickrematunge said in a statement. Pictures by Krishan Kariyawasam [foogallery id="17944"]