Cardiff prison inmate, 64, died after being found on floor Declan Mooney, 64, died on December 6 this year after being found on the floor Sign up for our Crime and Punishment NewsletterInvalid EmailSomething went wrong, please try again later. The inside stories on the latest court stories from Wales When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice A prisoner at HMP Cardiff died after being found on the floor, an inquest has heard. On Monday, December 14 an inquest was opened into the death of Declan Mooney, 64, at Pontypridd Coroner's Court.