Exhibit A: Secrets of Forensic Science

Murder in a Small Town (4x9)

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A young female taxi-driver is fatally stabbed and left to die in Banff. The investigators find a knife and blood in the abandoned cab. Hundreds of men are questioned and give blood samples in a cross continent manhunt. It is two years before police identify two suspects who refuse to co-operate. It will take undercover operations to get the DNA samples and put a killer behind bars.