The inside story of the investigation into the disappearance of a 15-year-old boy. A mum calls Bedfordshire 999 reporting that her 15-year-old son has gone missing, again. DC Lee Primonato from the dedicated Guns & Gangs unit immediately suspects that yet another child has been drawn into serious drug dealing and that the boy will, eventually, be found in a drug den. Recruiting children to hold a phone where drugs are ordered by customers has become an essential part of gangs' business model; because it makes it harder for the police. Cameras follow detectives as they make a breakthrough. Every twist and turn of the investigation is on camera as a raid is planned on a property where the police hope to find the controller of the drug line but the detectives are in for an unpleasant surprise.

Serial sexual predator Craig France is in custody, and officers from Cambridgeshire Police Rape Investigation team wait for the CPS to approve charges for rape and voyeurism. However, the satisfaction of getting a charge is short-lived, as they're only just beginning to understand the darkest depths of France's criminality.

The first of a two-part documentary featuring unprecedented access behind the scenes of a crime investigation into a serial rapist who Cambridgeshire Police believe preyed on dozens of women. The suspect, Craig France, has a reputation across Peterborough's nightclub scene and for the notorious hot-tub afterparties he has hosted at his house. A search of France's house reveals an obsession with hidden recording devices. As officers download the data from the cameras, what they find shocks them.

Detectives from the Major Crime Unit at Bedfordshire Police have a suspect in custody who admits to the crime - but the confession is only the beginning of a case that will bring a series of deeply disturbing twists and turns in a tale that shocks and surprises the experienced police team. Cameras follow as the police continue to probe the suspect and the interview becomes more and more chilling.

The inside story of the murder of a 74-year-old woman, and the macabre lengths the killer went to in attempting to conceal her death. Annette Smith's lodger reported that she has been missing for several weeks. Missing Persons find no trace of her. Detectives from the Major Crime Unit are called in on a gripping and disturbing case that shocks detectives.