The five other unexplained deaths linked to Pembrokeshire Murders killer John Cooper that have never been proved 'I know that Cooper had been at her house on the day she died – that troubles me greatly' Updated The video will auto-play soon8Cancel Play now There are always big stories on WalesOnline - don't miss any with our daily emailInvalid EmailSomething went wrong, please try again later. Sign me up now When you subscribe we will use the information you provide to send you these newsletters. Sometimes they’ll include recommendations for other related newsletters or services we offer....