London: Traces of mysterious DNA were found on the locked holdall containing the naked body of British spy Gareth Williams, the inquest into his unexplained death heard on Tuesday.
"Two minor components of another contributor`s DNA" were found on the zip toggle and padlock of the bag in which his decomposing body was found in a bath in his London flat, Detective Chief Inspector Jackie Sebire told the court.
The police officer said her team had worked from the start on the assumption that a "third party" was involved in the death of Williams, 31, despite their failure so far to find proof of another person`s presence when he died.
His family has said they believe someone versed in the "dark arts" tried to cover up the circumstances of his August 2010 death.
"My opinion since I went into the scene is that a third party had been involved in the death or by putting the body in the bag," Sebire told the court.
Scotland Yard detectives have been stumped as to the cause of death and will show the court a video reconstruction of how Williams might have entered the bag by himself, after speculation he might have done so as part of a sex game.
Williams was said to have been a brilliant codebreaker and was on secondment to Britain`s external intelligence agency MI6 from GCHQ, the centre which monitors electronic communications.
His body was found in a foetal position in the bag which was padlocked from the outside, according to graphics shown to court. Beneath him inside the bag were keys that could have opened the lock.
"In my opinion he was very calm. His face was very calm. His hands were resting on his chest," Sebire said.
Sebire said there were no signs of a struggle in the red North Face holdall, adding that Williams "was very muscular, he trained regularly. It is only my opinion, but I would at least expect some tearing to the netting."
Forensic evidence included a spot of someone else`s blood in the building`s communal hallway, and in the flat a spot of Williams` blood which Sebire said could have dated from around the time he went missing or could be older.
There is "limited" scope for identifying anyone from the DNA but tests continue, she said.