MI6 spy found dead in bag probably locked himself inside, Met says | UK news | The Guardian: Last year, a coroner concluded that Williams was probably unlawfully killed and his death the result of a criminal act. Following an eight-day inquest, the Westminster coroner, Dr Fiona Wilcox, said he was probably either suffocated or poisoned, before a third party locked and placed the bag in the bath.
But Hewitt said Scotland Yard's three-year inquiry had come to a different conclusion and that Williams was "most probably" alone when he died.
"Despite all of this considerable effort, it is still the case that there is insufficient evidence to be definitive on the circumstances that led to Gareth's death," he said.