MI6 biographer Stephen Dorril explained that most of the names were "light-cover" sources who worked out of embassies or missions posing as diplomats. Dorril argued, "it is well known that rival intelligence networks know who these people are and accept them." MI6 claimed that Tomlinson had originated the list, which was something he had previously threatened to do, although he denied responsibility for it, and MI6 were unable to substantiate their accusation. Tomlinson wrote, "If MI6 had set out to produce a list that caused me the maximum incrimination, but caused them the minimum damage, they could not have done a better job." He also said, "It mystifies me why MI6 gave the list credibility. If they were really worried about the safety of their agents they could have denied it." After The Sun newspaper called Tomlinson a "traitor" and published his email address, he received death threats, and fearing for his life, went into hiding for a time. Government officials later conceded that the list did not originate from Tomlinson. Diana, Princess of Wales During 2008, Tomlinson was a witness for the inquest into the deaths of the Princess of Wales and Dodi al Fayed. He had suggested that MI6 was monitoring Diana before her death and that her driver on the night she died, Henri Paul, may have been an MI6 informant, and that her death resembled plans he saw during 1992 for the assassination of Yugoslav President Slobodan Milošević, using a bright light to cause a traffic accident. At the Coroner's Inquest into the death of the Princess, on 13 February 2008, speaking by video-link from France, Tomlinson conceded that, after the interval of 16 or 17 years, he "could not remember specifically" whether the document he had seen during 1992 had in fact proposed the use of a strobe light to cause a traffic accident as a means of assassinating Milošević, although use of lights for this purpose had been covered in his MI6 training. On being told that no MI6 file on Henri Paul had been found, Tomlinson said that it "would be absurd after 17 years to say I can positively disagree with it, but... I do not think the fact that they did not manage to find a file rules out anything either". He said he believed MI6 had an informant at the Paris Ritz but he could not be certain that this