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Police turn to a footprint analyst and a pollen expert to help solve a murder in Manchester, and a soil expert unearths the evidence needed to arrest a gang of treasure thieves.
A blood spatter analyst unlocks the mystery of a woman murdered in her own car, and an expert witness uses a mobile phone to help detectives solve a baffling murder case.
Blood spatter analysis helps identify the killer of a body found in a suitcase, and an expert helps in a serious case of financial fraud that cost some victims their life savings.