Tuesday 27 October 2026Compiled from published reports. Every claim links to its source.

Ireland Crime

Every case followed from the first report to the sentence, or to where the reporting stopped.

Case No. 0141Assault with intent to cause bodily harm · Co. Dublin · 17 Apr 2024

Convicted killer Derek Boyd jailed for one year for pub assault in Finglas

Derek Boyd, 31, a man, punched a man outside the Abbey Tavern in Finglas, Dublin, in April 2024, knocking him to the ground and causing a nosebleed. The injured man declined to co-operate with the garda investigation, but Boyd was arrested, initially denied it was him, and then pleaded guilty to assault with intent to cause bodily harm on April 17, 2024. Judge Martin Nolan sentenced Boyd to one year in Dublin Circuit Criminal Court. Boyd is already serving a life sentence for the murder of Mark Carroll in June 2024 and a four-year sentence, with two years suspended, for the manslaughter of his sister Sandra Boyd in 2022.

  1. Reportednot reported
  2. Arrestednot reported
  3. Chargednot reported
  4. In courtnot reported
  5. Verdictnot reported
  6. Sentenced14 Oct
reportedhappened, not reportedlatest stagenot yet

Key facts

consolidated from all reports
What happened
Boyd punched a man outside the Abbey Tavern, Finglas, in April 2024, knocking him to the ground and causing a nosebleed.
Where
The assault took place outside the Abbey Tavern, Finglas, Dublin.
When
The assault occurred in April 2024, less than two months before the murder of Mark Carroll on June 9, 2024.
Cause
A disagreement at the Abbey Tavern preceded the assault, and Boyd was escorted from the pub by family members, left the area, and returned a short time later.
Investigation
  • The injured man declined to co-operate with the garda investigation, and Detective Garda Robert Diffley viewed CCTV footage as part of another investigation.
  • Boyd was arrested and denied it was him when interviewed.
Charges
Boyd pleaded guilty to assault with intent to cause bodily harm on April 17, 2024.
In court
Boyd appeared in Dublin Circuit Criminal Court.
Sentence
Judge Martin Nolan sentenced Boyd to one year for the assault.
Other details
  • Boyd is serving a life sentence for the murder of Mark Carroll, for which he was convicted in July 2025.
  • Boyd was sentenced to four years with the final two suspended in December 2022 for the manslaughter of his sister Sandra Boyd, 36, in March 2022 at Collins Place, Finglas.
  • Boyd has previous convictions for manslaughter and the unlawful possession of a firearm.
19 statements extracted from the articles
  • whatBoyd punched a man, knocking him to the ground. (irishmirror.ie)
  • whatThe injured man was bleeding from his nose when he got up. (irishmirror.ie)
  • whereThe assault took place outside the Abbey Tavern, Finglas, in April 2024. (irishmirror.ie)
  • whenMark Carroll was murdered on June 9, 2024. (irishmirror.ie)
  • whenThe manslaughter of Sandra Boyd occurred in March 2022 at Collins Place, Finglas. (irishmirror.ie)
  • causeSandra Boyd's death was caused by an accidental discharge of an illegally-held loaded semi-automatic pistol. (irishmirror.ie)
  • investigationDetective Garda Robert Diffley viewed CCTV footage as part of another investigation. (irishmirror.ie)
  • investigationThe injured man declined to co-operate with the garda investigation. (irishmirror.ie)
  • investigationBoyd was arrested and denied it was him when interviewed. (irishmirror.ie)
  • chargeBoyd pleaded guilty to assault with intent to cause bodily harm on April 17, 2024. (irishmirror.ie)
  • courtBoyd was convicted of the murder of Mark Carroll in July 2025. (irishmirror.ie)
  • courtBoyd appeared in Dublin Circuit Criminal Court. (irishmirror.ie)
  • sentenceDerek Boyd was sentenced to one year for punching a man outside the Abbey Tavern in Finglas. (irishmirror.ie)
  • sentenceDerek Boyd is serving a life sentence for the murder of Mark Carroll. (irishmirror.ie)
  • sentenceBoyd was sentenced to four years with the final two years suspended in December 2022 for the manslaughter of his sister Sandra Boyd. (irishmirror.ie)
  • otherBoyd has previous convictions for manslaughter and the unlawful possession of a firearm. (irishmirror.ie)
  • otherBoyd told gardaí that he committed an unpardonable sin for which he will pay for the rest of his life. (irishmirror.ie)
  • otherThere was a disagreement at the Abbey Tavern. (irishmirror.ie)
  • otherBoyd was escorted from the pub by family members, left the area, and returned a short time later. (irishmirror.ie)

The reporting

newest first
  1. 14 Oct2026
    Sentencedirishmirror.ie, first report
    Convicted killer who punched man outside Dublin pub learns his fate

    Reports the one-year sentence imposed by Judge Martin Nolan for the April 2024 pub assault, and provides background on Boyd's life sentence for the murder of Mark Carroll and his earlier manslaughter conviction for the death of his sister Sandra Boyd.

    convicted, Derek Boyd, 31, male, named, irish (judged from name)Derek Boydvictim, malevictim, Mark Carroll, male, irish (judged from name)Mark Carrollvictim, Sandra Boyd, 36, female, irish (judged from name)Sandra Boyd