When 31-year-old MI6 codebreaker Gareth Williams was found dead inside a padlocked sports bag in his London apartment, investigators were left with a scene as baffling as it was chilling. With no signs of forced entry, almost no forensic evidence, and a timeline clouded by secrecy, his death sparked worldwide speculation: Was it a tragic accident, a covert assassination, or something far stranger? In this episode, Vanessa Richardson unpacks the twists, missteps, and explosive revelations surrounding one of the UK’s most mysterious modern cases — and explores why, more than a decade later, the truth remains fiercely debated.

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