Ms Poll was killed while on shift at a Salisbury stationery shopMatthew Donald Tilley, 48, is on trial accused of murdering Suzanne Poll in the Salisbury stationery shop where the 36-year-old worked in 1993.
Prosecutor Carmen Matteo told the jury that blood samples taken from the scene were decades-later matched to Mr Tilley and he was arrested in September last year. Ms Abbey said the jury was required to prove beyond reasonable doubt that Mr Tilley's blood was at the scene "because he is the killer". "You can't exclude, I suggest, the risk that there has been a contamination which has affected those results," she told the jury.
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