The brutal assassination in Beirut in 1979 of a terrorist warlord known as the Red Prince saw a mysterious clue left at the scene - the passport of a young British woman, Erica Chambers. But was she really a killer cold-blooded enough to set off a bomb which tore apart innocent bystanders? Presenter Amelia Hemphill talks to Tom Rawstorne, who investigated... and found chilling hints that the English assassin might still be alive.

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