The Pembrokeshire Murders - Episode Guide

Newly returned to Pembrokeshire, Detective Superintendent Steve Wilkins looks into a brutal double murder which was never solved. Known locally as the Coastal Path murders, he is shocked to discover links to two other notorious unsolved crimes.

With their forensics budget running out and still no forensic ‘golden nugget', Detective Steve Wilkins and his team spend three days interviewing their prime suspect, John Cooper. With fresh leads to follow, Steve is re-energised, but being so absorbed with work comes at a price at home. When Cooper's second parole hearing is successful, it's a blow to both Steve's team and Cooper's estranged son Andrew. What fresh horrors might Cooper commit now that he's free after 10 years in prison?

Now John Cooper is free and his wife, Pat, dead, the stakes have never been higher for Detective Steve Wilkins and the Operation Ottawa team. Steve goes over everything in the files again and strikes gold with an old crime scene photo, which leads him to the elusive khaki shorts. Forensic testing on these shorts gives them the ‘golden nugget' they've been searching for, and Cooper is arrested and charged. Steve and the team must now put their faith in barrister Gerard Elias to prosecute Cooper and get him convicted for his crimes.

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.