Case No. 2837Murder · Co. Dublin · 29 Jul 2022
Mountjoy prisoner David Dunne convicted of murdering fellow inmate Robert O'Connor
David Dunne, 40, was convicted by a unanimous Central Criminal Court jury of murdering Robert O'Connor, 32, at Mountjoy Prison on 29 July 2022 after luring him into his cell and stamping on his head. He is to be sentenced on 16 December 2024 and faces a mandatory life term.
- Reportednot reported
- Arrestednot reported
- Chargednot reported
- In court19 Nov
2 reports - Convicted28 Nov
2 reports - Sentenced
reportedhappened, not reportedlatest stagenot yet
Key facts
consolidated from all reports47 statements extracted from the articles
- whatPrison officers witnessed David Dunne stamping and delivering kicks to the head of Robert O'Connor. (irishmirror.ie)
- whatDavid Dunne told gardaí that Robert O'Connor had attacked him and he had acted in self-defence. (irishmirror.ie)
- whatO'Connor was brought to Mater Hospital where he was intubated and attempts were made to resuscitate him. (irishmirror.ie)
- whatA CT scan demonstrated a very severe brain injury with bleeding and swelling to the brain. (irishmirror.ie)
- whatA post mortem on 3 August by State Pathologist Dr Linda Mulligan disclosed multiple blunt force trauma injuries to head, trunk, arms and legs. (irishmirror.ie)
- whatDr Linda Mulligan is the Chief State Pathologist giving evidence at the trial. (irishmirror.ie)
- whatDavid Dunne, 40, has a last address in Summerhill, Dublin 1. (irishmirror.ie)
- whatO'Connor was assaulted on 27 July resulting in a bleeding nose and damage to his right pupil. (irishmirror.ie)
- whatO'Connor was advised to go to Accident & Emergency but refused. (irishmirror.ie)
- whatTwo days after the first assault, O'Connor suffered a second assault resulting in a collapse. (irishmirror.ie)
- whatO'Connor went into a coma and remained unresponsive despite medical attention over three days. (irishmirror.ie)
- whatBrain stem testing showed O'Connor was dead and his kidneys were donated. (irishmirror.ie)
- whatO'Connor suffered multiple blunt force trauma injuries with bruises and abrasions on his head, trunk, legs and arms, and a fractured nose. (irishmirror.ie)
- whatBrain examination showed swelling, bleeding and damage due to a lack of oxygen and blood supply. (irishmirror.ie)
- whatThe significant brain trauma was most likely sustained during the second alleged assault. (irishmirror.ie)
- whatIt would not have been possible for O'Connor to be upright and walking with those injuries. (irishmirror.ie)
- whatO'Connor did not suffer any skull fractures. (irishmirror.ie)
- whatThe injuries were consistent with stamping, punching or kicking. (irishtimes.com, irishmirror.ie)
- whatDunne claimed he did not intend to kill O'Connor and had an honest belief he was acting in self-defence. (irishmirror.ie)
- whatTwo days later, CCTV showed O'Connor entering Dunne's cell on the C2 landing, followed by Dunne and three other men. (irishmirror.ie)
- whatOne prison officer saw Dunne stamping more than once on O'Connor's head, while another saw him kicking the victim in the head. (irishmirror.ie)
- whatDunne claimed he just wanted a chat with O'Connor but once inside the cell, O'Connor punched him twice, and he initially admitted only to punching back. (irishmirror.ie)
- whatDunne said he didn't want to kill O'Connor and claimed to have struck him with a rabbit punch. (irishmirror.ie)
- whatCCTV evidence suggested an element of coordination in the interactions between Dunne and three other prisoners before the fatal encounter. (irishmirror.ie)
- whereDavid Dunne's last address is Summerhill, Dublin 1. (irishmirror.ie)
- whereDunne's last address was Summerhill, Dublin 1. (irishmirror.ie)
- whenThe fatal assault occurred at approximately 5.30pm on 29 July on C landing. (irishmirror.ie)
- whenDavid Dunne was arrested on 16 November 2022 on suspicion of murder. (irishmirror.ie)
- whenO'Connor's death was formally pronounced at 1.34pm on 1 August 2022. (irishmirror.ie)
- whenO'Connor was pronounced dead on 1 August 2022 when brain stem testing revealed no activity. (irishtimes.com)
- whenO'Connor received a prison sentence on 27 July 2022 and was returned to Mountjoy that evening. (irishmirror.ie)
- whenO'Connor was taken to hospital and pronounced dead on 1 August when brain stem testing revealed no activity. (irishmirror.ie)
- causeThe cause of death was blunt force trauma to the head. (irishmirror.ie)
- causeThe blunt force trauma injuries caused O'Connor's death without any other contributing factors. (irishmirror.ie)
- causeO'Connor suffered multiple blunt force trauma injuries to his head, torso, arms and legs. (irishmirror.ie)
- causeBlows to O'Connor's head caused his brain to rotate, leading to the tearing of nerve cells. (irishmirror.ie)
- causeChief State Pathologist Dr Linda Mulligan said O'Connor died from multiple blunt force trauma type injuries associated with bruises and abrasions on his head, trunk, legs and arms, and a fractured nose. (irishmirror.ie)
- courtThe trial continues before Ms Justice Mary Ellen Ring and a jury. (irishmirror.ie)
- courtA jury of nine men and three women at the Central Criminal Court returned a unanimous verdict of guilty of murder against David Dunne. (irishtimes.com)
- courtThe jury at the Central Criminal Court returned a unanimous verdict of guilty of murder against David Dunne, 40. (irishmirror.ie)
- courtProsecution counsel Michael Delaney SC described Dunne's account as self-serving and lacking in credibility, accusing him of a vicious and unprovoked assault. (irishmirror.ie)
- courtDefence counsel Brendan Grehan SC said the killing was not intentional or planned but was in fact a reaction without premeditation, and asked the jury to return a verdict of manslaughter. (irishmirror.ie)
- sentenceDunne will face a mandatory term of life imprisonment, with sentencing on 16 December 2024. (irishmirror.ie)
- otherO'Connor had one half-brother and a half-sister, and his mother died in 2008. (irishtimes.com)
- otherO'Connor was born in the UK to an Irish father and English mother, and the family returned to Ireland when he was a small child. (irishmirror.ie)
- otherO'Connor had one half-brother and one half-sister, and his mother died in 2008. (irishmirror.ie)
- otherO'Connor had been in a relationship for one year and his death had a dramatic and serious effect on his girlfriend's health. (irishmirror.ie)
The reporting
newest first- 28 Nov2024Mountjoy prisoner murdered fellow inmate after 'luring' him to cell, court told
Jury of nine men and three women returned unanimous guilty verdict after less than three hours; sentencing adjourned to 16 December 2024 for victim-impact statements.
victim, Robert O'Connor, 32, male, irish (judged from name)Robert O'Connorconvicted, David Dunne, 40, male, named, irish (judged from name)David Dunne - 28 Nov2024Mountjoy prisoner ‘lured’ fellow inmate to cell and murdered him
Reports the unanimous guilty verdict at the Central Criminal Court, the pathologist's findings on the cause of death, the sequence of events in the prison, and the defence and prosecution closing arguments. Sentencing adjourned to 16 December 2024.
victim, 32, male, irish (judged from name)convicted, David Dunne, 40, male, named, irish (judged from name)David Dunne - 22 Nov2024Pathologist tells trial prisoner died from injuries that caused brain to rotate
Pathologist Dr Linda Mulligan's testimony on the mechanism and cause of death, including details of the two assaults, the brain injury, and the defence's self-defence account.
victim, Robert O'Connor, male, irish (judged from name)Robert O'Connoraccused, David Dunne, 40, male, named, irish (judged from name)David Dunne - 19 Nov2024Mountjoy prison officers saw murder accused 'stamping' on head of inmate
Prosecution opening statement at trial: details of the assault as witnessed by prison officers Conor Kenny and Jonathan Deegan, the medical evidence (Glasgow Coma Scale of three, severe brain injury, cause of death blunt force trauma to the head), the post mortem by Dr Linda Mulligan, and Dunne's self-defence account given to gardaí.
victim, Robert O'Connor, 32, male, irish (judged from name)Robert O'Connoraccused, David Dunne, 40, male, named, irish (judged from name)David Dunne