Detective Superintendent Steve Wilkins reinvestigates one of Pembrokeshire's most notorious unsolved crimes, known locally as the Coastal Path Murders.
With Cooper's second parole hearing looming closer, Detective Steve Wilkins and his team face Cooper head-on in three days of interviews.
A long-awaited forensic breakthrough gives Detective Steve Wilkins and his team the ammunition they need to finally arrest and prosecute John Cooper.
Following on from the three-part drama, this documentary tells the real story behind the Pembrokeshire Murders. After murdering four people in Pembrokeshire, John Cooper eluded prosecution for 20 years until a new detective team and advances in forensic science finally saw him put behind bars in 2011. For the first time, the key people involved in the case reveal their role in bringing the serial killer to justice.
