The boy who came back from the dead
7 February 2013 Last updated at 17:22 GMT
Police have never been able to identify the boy whose dismembered torso was found floating in the Thames in 2001.
Two years ago a witness said that a photograph, found in a storeroom in Germany, was the murder victim.
Now she admits she was wrong. Angus Crawford travelled to Germany and tracked down the boy in the photograph.