DNA mix-up over spy death

Forensic scientists have apologised to the family of spy Gareth Williams after it emerged a DNA error had dashed a key line of inquiry into his death. It meant Scotland Yard spent more than a year trying to trace a non-existent suspect.

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  1. Jon Clements

Review hears about 'problems in the DNA analysis'

A lawyer for the police said he was worried about "sensationalising" the inquest with a live demonstration of the bag and offers a video clip by an expert as alternative.

Police reveal "problems in the DNA analysis" of mixed profile found on Williams' hand - found the contamination was from scientist at scene.

The error was spotted by a scientist who's evidence helped convict the killers of Stephen Lawrence in January. The coroner wants to hear from her.

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