Synopsis
When a teenager's body is located in a shallow grave, a soil specialist is called on to unearth evidence to convict the killer. And as a murder investigation on Merseyside stalls, a fibre expert is enlisted to revive the case.
Similar broadcast resources

S3E6: Face of a Killer and Proof in the Pollen | Expert Witness
When a young man is stabbed to death, a facial recognition expert helps Merseyside Police catch the killer. And a specialist palynologist's help is needed by detectives investigating the disappearance of an elderly couple.

S1E5: DNA, Fibres and Crime Scene Management (Extended Version) | Expert Witness
DNA and an expert witness solve a 50-year-old cold case, a murder is solved by tracking unusual fibres around the world, and how to preserve and examine a crime scene.