In October 1998, Jenny King vanished. The 22-year-old had been on a night out at a club near her home in Kingswood near Bristol, in the South West of England.

Police realised the office worker was in a good, stable relationship. She had no enemies. And no-one would want to harm her.

But a friend of Jenny’s came forward. In the hour before Jenny disappeared, she had said something about a ‘psycho ex boyfriend’ being in the nightspot.

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Days later, police made an horrific discovery. But at this deposition site they found a set of keys.

Who was this ‘psycho ex boyfriend' and whose door would the keys unlock?

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