After a decomposed body is found in a freezer at a waste disposal site, West Midlands Police must identify who it is, and track down the person who concealed it.

When 32-year-old Marlene Doyle, reported missing by her mother, is found murdered in a Coventry flat, police turn to forensic evidence to identify her killer.

A man rings 999 to say he has killed his flatmate and forensics officers search for clues that could prove or disprove the suspect's pleas of self-defence.