MI6 spy Gareth Williams, who was found dead inside a bag in 2010, had hacked into restricted information about Bill Clinton, it has been claimed.
Mr Williams, a 31-year-old employee of GCHQ who was seconded to the Secret Intelligence Service (MI6), was found dead inside a padlocked bag at a safe house in London.
The Sun on Sunday newspaper quotes an intelligence source as saying Mr Williams had obtained sensitive documents regarding former US president Bill Clinton.
It is claimed that Williams had obtained Clinton's diary for a party and passed it to a friend who was also to be a guest at the event.
“The Clinton diary hack came at a time when Williams’s work with America was of the most sensitive nature,” the source is reported to have told the newspaper.
“It was a diplomatic nightmare for Sir John Sawers, the new director of MI6 at the time.”
A coroner had previously ruled that Mr Williams was probably unlawfully killed and that his death was likely to have been the result of criminal actions.
Dr Fiona Wilcox said in 2012 however that it was unlikely his death “will ever be satisfactorily explained”.
Police have previously said that a third party “may have been” involved in Mr Williams’ death, but in 2013 Scotland Yard claimed that he had padlocked himself in the bag.
“The MPS position is that, on balance, it is a more probable conclusion that there was no other person present when Gareth died. But the reality is that… there exist evidential contradictions and gaps in our understanding,” said Deputy Assistant Commissioner Martin Hewitt.
A number of theories have been posited regarding Mr Williams’ death, including that he was involved in a “sex game gone wrong”, or targeted by foreign or domestic intelligence services.
Last week, it was reported that agents may have broken into Mr Williams' central London apartment through a skylight. It is claimed spies re-entered the building in order to destroy evidence while the property was under armed police guard after the spy's body had been removed.
An anonymous source told the Mirror that forensic officers realised that footplates, equipment that allows officers to move through a crime scene without contaminating it, had been moved in their absence.
It is reported that detectives concluded someone must have scaled the walls of the building and entered through the skylight to clear up their tracks.
The lawyer for Mr Williams' family, Anthony O’Toole, told a 2012 pre-inquest hearing at Westminster coroner’s court: “The impression of the family is that the unknown third party was a member of some agency specialising in the dark arts of the secret services, or evidence has been removed postmortem.”
The MI6 spy Gareth Williams would have suffocated within three minutes after getting inside his sports holdall, the inquest into his death heard yesterday. Poisoning and asphyxiation are the “foremost contenders” for cause of death, pathologists said.
The boss of MI6 officer Gareth Williams, whose naked body was found in a padlocked bag, faced severe criticism at the inquest into the death for failing to issue an effective alert despite the agent not being at work for more than a week.
Gareth Williams, the MI6 officer who was found dead in a padlocked holdall in his bath, was so unhappy about "friction" at work and the "rat race" that he had asked for a transfer back to his previous post, his family has disclosed.