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21 Episodes 0 - 2019
Episode 1
In December 2000 19-year-old Rachel Manning was murdered in Milton Keynes. Two men were wrongfully convicted, but new advances in forensics proved that evil always leaves a trace.
Episode 2
Looking at the case of the 'M25 Rapist', who became synonymous with fear and triggered one of the biggest manhunts in British history.
Episode 3
The Pittsburgh Police Force and the FBI raced against time to locate missing 13-year-old Alicia Kozakiewicz.
Episode 4
When the body of a child is found, Boston State Police have no leads, but with the help of the National Centre for Missing and Exploited Children, a trace is found.
Episode 5
Christine Eadie and Helen Scott vanished without a trace in October 1977. The police never stopped hunting for them, even changing the law to bring justice.
Episode 6
Digital forensics, traditional police work and a good old fashioned stake out stop a killer in his tracks, when all he has left is a digital trace.
Episode 7
The city of Baton Rouge goes into lock-down when women start to go missing, and investigators and family members work together to find that illusive trace of evil.
Episode 8
Residents in Baton Rouge discover a second serial killer is at work, but when he leaves a trace at a scene, the police get an unexpected breakthrough.
Episode 9
The body of EastEnders actress Gemma McCluskie was discovered in the Regent's Canal in March 2012, and detective work eventually led police to her brother, Tony.
Episode 10
The case of Tracie Andrews, who murdered her fiance Lee Harvey in 1996.
Episode 11
When a young couple were found executed in their home in October 2015, at first there were no apparent leads. The murderer, however, had left crucial evidence behind.
Episode 12
Chilling account of a bus stop sexual assault that remains unsolved for many years until DNA evidence brings the perpetrator to light. Setting is Nottingham England. Christopher Scott, the perpetrator, is discovered by law enforcement after his son contacts police for help during a domestic altercation involving a knife.
Episode 13
When a box containing human limbs was discovered in Florida, an investigation started that tested forensic capabilities to the limit, with detectives desperate to discover who the victim was.
Episode 15
An examination of the case of David Jackson, who disappeared from home 15 years ago. The case remained unsolved until one investigator broke the case wide open.
Episode 16
Episode 17
South Wales - 1973. After three murders in three months, police realise they are looking for Wales' first documented serial killer.
Episode 20
After body parts were found in a Dublin city canal, a broad forensic investigation was needed to identify the victim, and lead Police to those responsible.
Episode 21
The mutilated bodies of two women sparked a massive police manhunt. With advances in forensic science, investigators brought Ireand's only living serial killer to justice.
Episode 23
A killer, who identified then murdered his victims, caused a manhunt which lasted nearly three decades, but the science of DNA eventually led to his capture.
Episode 24
A popular, healthy, 60-year-old woman suffered a sudden, painful death. Detectives managed to trace the killer, despite their calculated and elaborate web of deceit.
Episode 26
Beverly Therrien and her two house guests were beaten to death. Investigators identified the killer, who was sentenced to 180 years for the three murders.