Robbie Coltrane's Critical Evidence: Season 1, Episode 4

1 - 4: The Hitman and the Hairdresser

A 29 year old hairdresser was found brutally stabbed on her doorstep in a quiet suburban street of London. A recording of a threatening phone call seemed to suggest the motive, but every lead comes to a dead end. Her husband, Fadi Nasri made a distraught appeal for help in finding his wife's killer. Both the police and the public sympathised with the man who had lost his wife so brutally.In an obsessive hunt for critical evidence, detectives finally found the murder weapon after an extraordinary search and refused to give up in the face of daunting odds. Investigators managed to piece together a picture of events surrounding the victim's death from circumstantial evidence, leading them to a shocking conclusion.