It is not the first time the murder of Debbie Linsley has been re-investigated. In 2002 police thought that they had made a similar breakthrough, giving them the ability to complete a map of the killer's DNA , left behind at the scene.
Here is a news report from 13 September 2002.
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The 47-year-old man died shortly after 3pm on Tuesday.
Specialist explosive detection dogs searched through the town examining letter boxes and phone booths for signs of potential devices.
Temperatures reached 29.1C in St James's Park, central London.