The inquest into the “highly controversial death” of MI6 operative Gareth Williams has opened in London.
The naked, decomposing body of the 31-year-old was found curled up inside a padlocked bag at his flat in Pimlico, London in August 2010.
Since then the police have been unable to find any clues after a painstaking inquiry.
The judge has granted four intelligence officers “public interest” anonymity while giving evidence in order to protect national security.
The family of the victim want to know why the alarm was not raised when he failed to turn up to work amid claims of a secret service cover-up.
By the time his body was discovered vital evidence had been lost.