Imagine a killer so brave, so cold and callous, that they'd partake in a TV gameshow after murdering several people. That's what John Cooper did after committing the Pembrokeshire murders. This week, G&G explore the Pembrokeshire killer John Cooper. In this fascinating case, police successfully prosecuted John for 4 murders after reopening a cold case. Some of John's crimes were particularly violent, and the extra sad part is some of his victims were simply trying to enjoy their holidays.

However, did John Cooper have other victims? Three cases stand out with ties to John Cooper. Which ones do you think he was involved with?