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Expert WitnessSeries 3Episodes

    Threads of Evidence and Bad Chemistry

    9/15A UK fibre specialist brings closure to Australia’s longest-running murder investigation.

    Hidden Blood and Traces of a Killer

    7/15An expert witness helps police link a drug gang to the death of a man in Wales.

    Face of a Killer and Proof in the Pollen

    6/15A facial recognition expert helps Merseyside Police catch the killer of a young man.