David Dunne, a 40-year-old repeat offender, has been sentenced to life imprisonment for the murder of fellow inmate Robert O’Connor at Mountjoy Prison. Dunne was convicted for luring O’Connor into his cell and assaulting him brutally, leading to O’Connor’s death three days later. Despite pleading not guilty, evidence including CCTV footage played a crucial role in the trial. The judge highlighted O’Connor’s innocent background and the devastating impact of the crime on his family, who will live with their loss forever.