(CBS News) LONDON - Some of Britain's top investigators are stumped by a spy mystery that gets stranger by the day. CBS News correspondent Elizabeth Palmer reports detectives have called in called in computer experts, even a contortionist to solve it.
It took Britain's intelligence services a whole week to make this call to the police after a 31-year-old junior spy didn't show up for work: "I want to report one of our staff who lives and works in London missing."
Police started their search for Gareth Williams at his home. But what they found when they got inside his third floor apartment quickly turned what had been a simple missing persons case into a baffling mystery.
In the bathroom, a red duffel bag sat in the tub - padlocked. Inside it was Williams tightly folded naked body.
Detectives found no signs of a struggle in the apartment . And nothing to show whether this was a homicide or a suicide.
Police even asked a yoga expert to prove whether Williams could have locked himself in as a kind of stunt.
Unlikely said the expert.
Gareth Williams was an athlete.
And, as police discovered when they searched his computer, he had a secret interest in bondage.
Security cameras showed images of him shopping alone. They are the last known pictures of Williams.
What happened after he got home , and who - if anyone - was there, remains an open question.
Which, unlike the best fictional spy stories, may never be resolved.