Family of code-breaker criticise MI6 employer 'failure'
2 May 2012 Last updated at 15:33 BST
MI6 officer Gareth Williams was "on the balance of probabilities" unlawfully killed, a coroner has said.
Giving a narrative verdict, Fiona Wilcox said it was unlikely he got into the bag he was found dead in alone, but it was unlikely his death would ever be explained.
The body of the 31-year-old code-breaker from Anglesey was found locked in a bag in his London flat in 2010.
Speaking outside the court after the verdict, the family's solicitor, Robin Williams, said the actions of MI6 as an employer had worsened their grief.