Expert Witness
S04E08 Beneath the Ashes
When firefighters find a woman's corpse in a blazing apartment, a blood spatter expert employs a daring and experimental technique to uncover crucial evidence. Meanwhile, a cold case in Wales is resolved as familial DNA is utilized for the first time to pinpoint a serial killer.
Season 4 Episodes
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The Murder of Sarah Payne: Fields of Evidence
The Body in the Suitcase
The Wheelie Bin Killer
Cracking the Killer's Code
Catching a Cold Case Killer
Murderers, Messages and the Breakfast Killer
The Boy in the Woods - The Murder of Rikki Neave
Beneath the Ashes
Lured to the Woods
The Shooting of Olivia Pratt-Korbel
Blood on the Carpet
The Rachel Nickell Murder: Justice at Last
Unearthing the Truth
Blood on His Hands
Buried Secrets