Detectives investigating the 20-year-old murder of a woman say they have found DNA that could help solve the case, thanks to advances in technology.
Ms Bettles was 22 and working on the Norwich red-light district in 2002. Her body was found 3 days later. The killer was never identified. New forensic techniques allow better analysis of small quantities of DNA, so the hunt is on for her killer. The police want to rule out those she knew, and also to trace people mentioned in a recently found notebook.