23/04/2012 05:51 BST

Gareth William Death: Key Questions Surrounding the MI6 Agent's Death

In one of the highest profile and most memorable criminal mysteries in recent years, the death of the MI6 spy Gareth Williams, found in a padlocked holdall in his London home, will be attempted to be solved by an inquiry featuring over 30 witnesses.

There are a multitude of unanswered questions for the investigation to try to answer, but here are some of the key mysteries still outstanding:

  • Were secret agents specialising in the "dark arts" responsible for Mr Williams's death in his Pimlico home?
  • Is it physically possible that he was able to get inside a North Face holdall in his bathtub before padlocking himself in?
  • Could a third party have been present when he died despite no trace of DNA or fingerprints?
  • Why did police remove the front door to his flat if there were no signs of a break-in?
  • Why was there no sign of struggle on his body? Could he have been drugged despite normal blood tests?
  • What exactly did Mr Williams do for the GCHQ listening station - was he an active MI6 agent when he died? Why had he been placed on secondment in London?
  • Why did it take colleagues eight days to realise he was missing?
  • What happened to Mr Williams's possessions that he kept in a shared locker at the MI6 headquarters?
  • Why have letters gone missing between the coroner and police in recent months?
  • Has information been withheld because shedding light on Mr Williams's death could jeopardise secret security operations?
  • Why did he fail to tell his employer that he was undertaking a series of part-time fashion courses at Central St Martins College?
  • Why did it take forensic teams more than a year to realise a spot of DNA on Mr Williams's hand matched a scientist on the crime scene?

Gareth William's investigation so far, in pictures...