Expert Witness Series 4Episodes Available now

Cracking the Killer's Code

4/15Police turn to a forensic linguist to crack the code of a gang using a secret language.

1/15The murderer of Sarah Payne is linked to the crime by a forensic pollen expert.

3/15When a body is found in a wheelie bin, an expert tracks the suspects’ mobile phones.

5/15Untying the knot in a dressing gown cord used to murder a woman finally nails her killer.

6/15An intelligence analyst tracks the killers of a man stabbed to death in his own home.

8/15After fire crews find a body in a burning flat, a blood spatter analyst finds evidence.

9/15When a teen is fatally stabbed, an expert analyses the wounds to shed light on the attack.

10/15An image analyst helps detectives unmask the killer of a young girl in Liverpool.

11/15A mother and son vanish in 1976. Forty years on, a blood analyst helps to find the killer.

12/15Rachel Nickell’s murder was unsolved until DNA technology finally identified her killer.