Season 3

When 33-year-old mother of five Sarah Wellgreen vanished from her home, her ex-partner Ben Lacomba reported her missing. But almost immediately, detectives sensed that something was not right.

The case of Raoul Moat, who attacked his ex-girlfriend, killed her new partner, and shot a police officer, before going on the run and leading Britain's law enforcement on a week-long manhunt. Through interviews with detectives, journalists and those caught in the middle of the chaos, this edition unravels the police work that brought the pursuit to its tragic end

When 55-year-old Muriel McKay disappeared from her Wimbledon home in December 1969, her family were thrown into a nightmare that would change their lives forever.

When 34-year-old Debbie Griggs went missing from her family home in Deal, her husband Andrew insisted she had simply walked out, leaving her young children behind. But police sensed something was deeply wrong.

In 2012 the murders of PC Nicola Hughes and PC Fiona Bone shocked the UK. This programme traces the police operation that brought fugitive and convicted killer Dale Cregan into custody.

In 2004, a crime of staggering brutality shattered a quiet community when Joan and Milroy Clarke were found stabbed dozens of times. And the horror only deepened when suspicion fell on their 20-year-old son.

Emma-Jayne Magson reports her boyfriend James Knight is unwell, but when paramedics rush to the scene, he's found dead from internal bleeding. And later, as officers investigate, her story starts to unravel.