The death of MI6 spy Gareth Williams was "most suspicious" and it is "highly likely a third party was involved" in his demise a senior Met officer involved in the investigation has said.
Speaking outside the inquest into his death after a corner ruled it was most likely he was unlawfully killed, DCI Jackie Sebire, said she had "always been satisfied that a third party may have been involved in his death… The investigation will now refocus and actively pursue all the lines of inquiry".
Sebrie pleaded for anyone with information to come forward. "His naked body was found in the most suspicious of circumstances," she said.
Minutes before the family of Williams railed against the "total inadequacies" of the the original police investigation of his death.
In a statement read out by the family's solicitor Robyn Williams after his inquest closed, the family said their grief had been "compounded" by the failure of MI6 to report their son missing, and the specialist branch of the police SO15 for failing to hand over all the relevant information.
"To lose a son and a brother at any time is a tragedy. To lose a son and a brother in such circumstances that have been outlined in the course of this inquest only compounds the tragedy," the said in the statement.
"Gareth was and always will be a special and adorned son and brother. We miss him every single day and cannot describe the depth of sorrow his absence leaves in our lives."
The plea came after the coroner overseeing the inquest into the death of MI6 spy Gareth Williams has said that it is "unlikely" that his mysterious death will ever be solved but it was likely he was unlawfully killed.
In assessing the initial investigation into his death, Dr Wilcox discredited both the police and MI6 in how they handled the case.
MI6 had previously been accused of mishandling evidence and failing to hand over evidence to the inquiry, while police were accused of not properly investigating a bag of nine USB sticks handed over to them during the investigation.
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Williams was found dead in a Government flat in Pimlico in August 2010.
After excelling at university at mathematics, Williams worked as a cipher and codes expert at the Government listening station, GCHQ.
Williams was then seconded to work at the Secret Intelligence Service headquarters in Vauxhall, London.
CCTV captures Williams entering Holland Road Tube Station on the 14th August 2010.
Caught on CCTV at Holland Road Tube Station the same day.
Seen the next day on CCTV in Hans Crescent, London
His body was found in a holdall in this Pimlico flat on the 24th of August 2010.
Williams' funeral was attended by Sir John Sawers, head of SIS.
Screengrab from a video reconstruction showing a yoga specialist trying to lock himself in a sports holdall unaided
Screengrab from a video reconstruction showing a person trying to close the zip and padlock themselves in a sports holdall unaided