The British spy whose body was found padlocked inside a bag in his flat had illegally hacked into secret data on former U.S. president Bill Clinton, it has been revealed.
Gareth Williams, 31, was discovered in a holdall in the bath at his London home five years ago this month, but the mystery surrounding his death has never been solved.
Today, it has been revealed the spy had dug out a guest list for an event Clinton was due to attend as a favour for a friend.
The hack breached Mr Williams’ security clearance and this sparked anger among MI6 bosses as tensions rose with U.S. security services over the spy’s transatlantic work, The Sun on Sunday has reported.
A source said: ‘The Clinton diary hack came at a time when Williams’ work with America was of the most sensitive nature.
‘It was a diplomatic nightmare for Sir John Sawers, the new director of MI6 at the time.’
The paper has also reported that voicemail messages Mr Williams, a maths genius and expert cryptographer, left for family and friends were deleted shortly after his death.
Earlier this month, it was revealed that detectives who investigated the mysterious death believe he was murdered and that his killers then broke back in through a skylight to cover their tracks.
The claim centres on the revelation that part of the forensic equipment placed in the flat after the body was found was moved – despite the fact the building was under armed police guard.
The theory supports his family’s suspicions he was murdered by ‘agents specialising in the dark arts of the secret services’.
Mr Williams had been working with the American National Security Agency in Washington before returning to London, where he underwent training and was sent on active operations.
The exact nature of his work remains a closely guarded secret, but sources claim he dealt with equipment that tracked the flow of cash from Russia to Europe.
The technology enabled MI6 to follow money trails from bank accounts in Russia to criminal European gangs. One theory is that Mr Williams had disrupted a mafia ring closely linked to the Russian state.
Read more: dailymail.co.uk