Stephen Tynan sentenced to six and a half years for razor-blade assault in Mountjoy Prison
Stephen Tynan, 49, a man serving a life sentence for the 2018 murder of his cousin, assaulted a fellow inmate with two razor blades melted into a toothbrush on the D landing of Mountjoy Prison on 21 November 2024. He pleaded guilty to one count of assault causing harm and one count of production of an article. In July 2026, Judge Elma Sheahan at Dublin Circuit Criminal Court sentenced him to four years for production of an article and six and a half years for assault, both running concurrently and backdated to his guilty plea earlier in the year.
- Reportednot reported
- Arrestednot reported
- Chargednot reported
- In courtnot reported
- Verdictnot reported
- Sentenced9 Jul
Key facts
consolidated from all reports- What happened
- Stephen Tynan assaulted a fellow inmate in Mountjoy Prison.
- Where
- The attack occurred on the D landing in Mountjoy Prison, Dublin.
- When
- The assault took place on 21 November 2024.
- Weapon
- The weapon was two razor blades melted into a toothbrush.
- Charges
- Tynan pleaded guilty to one count of assault causing harm and one count of production of an article.
- Sentence
- Tynan was sentenced to four years for production of an article and six and a half years for assault, both running concurrently and backdated to his guilty plea earlier in the year.
- Other details
- Tynan is serving a life sentence for the 2018 murder of his cousin and has five previous convictions.
- A code red was issued within the prison and medics were called; prison officers pulled Tynan from the injured party and restrained him.
- The complainant did not make a statement to the gardaí or a victim impact statement.
- Tynan had previously been the victim of an assault while in custody and was placed in the same area as his attackers.
14 statements extracted from the articles
- whereThe attack occurred on the D landing in Mountjoy Prison. (irishmirror.ie)
- whenThe assault took place on 21 November 2024. (irishmirror.ie)
- weaponThe weapon was two razor blades melted into a toothbrush. (irishmirror.ie)
- chargeTynan pleaded guilty to one count of assault causing harm and one count of production of an article in Mountjoy Prison. (irishmirror.ie)
- sentenceTynan was sentenced to four years for production of an article and six and a half years for assault, both running concurrently. (irishmirror.ie)
- sentenceThe sentences were backdated to when he entered his guilty plea earlier in the year. (irishmirror.ie)
- otherTynan is serving a life sentence for murder. (irishmirror.ie)
- otherHe was convicted in 2018 for the murder of his cousin. (irishmirror.ie)
- otherA code red was issued within the prison and medics were called. (irishmirror.ie)
- otherPrison officers pulled Tynan from the injured party and restrained him. (irishmirror.ie)
- otherTynan has five previous convictions. (irishmirror.ie)
- otherThe complainant did not make a statement to the gardaí or a victim impact statement. (irishmirror.ie)
- otherTynan had been the victim of an assault while in custody and was placed in the same area as his attackers. (irishmirror.ie)
- otherWhile in custody, Tynan is studying history and English. (irishmirror.ie)
The reporting
newest first- 9 Jul2026Murderer handed more jail time after razor-blade attack in Mountjoy
Reports the sentencing of Stephen Tynan for the prison assault, including details of the attack, the weapon, the judge's aggravating and mitigating factors, and the concurrent sentences backdated to his guilty plea.
convicted, Stephen Tynan, 49, male, named, irish (judged from name)Stephen Tynanvictim, male