Expert Witness Series 4 Episodes Available now
Blood on the Carpet
11/15 A mother and son vanish in 1976. 40 years on, a blood analyst helps to find the killer.
The Rachel Nickell Murder: Justice at Last
12/15 Rachel Nickell鈥檚 murder was unsolved until DNA technology finally identified her killer.
Unearthing the Truth
13/15 A boy's killer escapes detection. Thirty years on, a pollen expert finds crucial evidence.
Blood on His Hands
14/15 When a disabled woman is killed, her neighbour is suspected.
Buried Secrets
15/15 A murder in Glasgow goes cold. Seventeen years on, a soil expert helps convict the killer.
