Case No. 0689Murder, impeding prosecution, threat, assault · Co. Dublin · 9 Jun 2024
Derek Boyd on trial for murder of Mark Carroll in Finglas, Dublin
Mark Carroll, 34, was fatally stabbed at Scribblestown Place, Finglas, Dublin, in the early hours of 9 June 2024, after a group of four had spent the day drinking and taking cocaine. Derek Boyd, 31, of Scribblestown Place, is charged with murdering Carroll, threatening Carroll's partner Megan Rock with death or serious harm, and assaulting her, while his partner Chantelle Harcourt, 34, of Darndale, is charged with impeding prosecution at the scene and at Blanchardstown Garda Station. Both pleaded not guilty when arraigned at the Central Criminal Court on 29 June 2026. The trial, expected to last three weeks, is proceeding before Ms Justice Melanie Greally and a jury of seven men and five women, with the prosecution relying on CCTV footage showing Carroll running from the house clutching his chest and Boyd following shortly after.
- Reportednot reported
- Arrestednot reported
- Chargednot reported
- In court29 Jun
4 reports - Verdict
- Sentenced
reportedhappened, not reportedlatest stagenot yet
Key facts
consolidated from all reports- What happened
- Mark Carroll, 34, was fatally stabbed at Scribblestown Place, Finglas, Dublin, in the early hours of 9 June 2024.
- The prosecution case is that Derek Boyd, 31, stabbed Carroll with the intention of killing him or causing him serious harm during a seven-minute window.
- Where
- The incident took place at Scribblestown Place, Finglas, Dublin 11, where Boyd has an address; Harcourt is of Primrose Grove, Darndale, Dublin 17.
- When
- CCTV showed Carroll driving to Scribblestown Place at 2.32pm on 8 June 2024, and at 00.55 on 9 June he was seen running from the house clutching his chest, followed by Megan Rock and then Boyd.
- Cause
- Carroll died from three stab wounds, the fatal wound to the thorax penetrating the ribs and heart.
- Weapon
- A knife found at the front door was excluded as the murder weapon.
- Investigation
- Harcourt is alleged to have attempted to clean the scene before gardaí arrived and to have made a false statement at Blanchardstown Garda Station.
- Charges
- Boyd pleaded not guilty to murdering Carroll, threatening Megan Rock with death or serious harm, and assaulting her causing harm.
- Harcourt pleaded not guilty to impeding the apprehension or prosecution of the person who caused serious harm at the scene and at Blanchardstown Garda Station.
- In court
- Both were arraigned at the Central Criminal Court on 29 June 2026 and the trial began before Ms Justice Melanie Greally with a jury of seven men and five women, expected to last three weeks.
- Other details
- Boyd and Harcourt are in a relationship; Megan Rock was Carroll's partner; the four had spent the day together consuming significant alcohol and some cocaine.
- The prosecution will not adduce direct evidence of what happened inside the house during the seven-minute window in which Carroll was stabbed.
59 statements extracted from the articles
- whatCarroll was seen running past Scribblestown Avenue clutching his chest. (irishmirror.ie)
- whatHarcourt was seen coming to the front door from inside the house. (irishmirror.ie)
- whereMark Carroll came from the Finglas area and had a connection with the Ashbourne area in Co Meath. (irishmirror.ie, dublinlive.ie)
- whereMegan Rock has a connection to the Finglas and Ashbourne areas. (irishmirror.ie)
- whereDerek Boyd has an address at Scribblestown Place, Finglas, Dublin 11 (dublinlive.ie)
- whereChantelle Harcourt is from Primrose Grove, Darndale, Dublin 17 (dublinlive.ie)
- whereBoyd also has an address at Collins Place in Finglas (dublinlive.ie)
- whereMegan Rock also has a connection to the Finglas and Ashbourne areas (dublinlive.ie)
- whereBoyd has an address at Scribblestown Place, Finglas, Dublin 11 (irishmirror.ie)
- whereHarcourt is of Primrose Grove, Darndale, Dublin 17 (irishmirror.ie)
- whenCarroll was fatally stabbed in the early hours of June 9, 2024 at Scribblestown Place (irishmirror.ie)
- whenCCTV showed Mark Carroll driving to Scribblestown Place in Finglas at 2.32pm on June 8, 2024. (irishmirror.ie)
- whenAt 3.20pm on June 8, Boyd, Carroll and Rock entered The Village Inn in Finglas. (irishmirror.ie)
- whenAt 00.55 on June 9, Carroll was seen running from Scribblestown Place followed by Rock, then Boyd came running. (irishmirror.ie)
- whenAt 00.57, Boyd was seen leaving Scribblestown Place shouting and pointing towards Carroll and Rock. (irishmirror.ie)
- whenBoyd climbed over the roof at the rear of Scribblestown Place at 1am and then over a wall into a back garden onto Valley Park Road. (irishmirror.ie)
- whenAt 1.13am, Boyd exited a house on Westwood Road and got into a silver taxi. (irishmirror.ie)
- whenAt 2.06am, a black Volkswagen Passat entered the forecourt of an Applegreen station on the M1 in Lusk with Boyd in the front passenger seat. (irishmirror.ie)
- chargeDerek Boyd pleaded not guilty to murdering Mark Carroll at Scribblestown Place on 9 June 2024. (irishmirror.ie)
- chargeDerek Boyd pleaded not guilty to making a threat to kill Megan Rock or cause her serious harm. (irishmirror.ie)
- chargeDerek Boyd pleaded not guilty to assaulting Megan Rock causing her harm. (irishmirror.ie)
- chargeChantelle Harcourt pleaded not guilty to impeding the apprehension or prosecution of the person who caused serious harm at the scene. (irishmirror.ie)
- chargeChantelle Harcourt pleaded not guilty to impeding prosecution at Blanchardstown Garda Station in connection with the murder. (irishmirror.ie)
- chargeBoyd pleaded not guilty to murdering Mark Carroll at Scribblestown Place on 9 June 2024 (dublinlive.ie)
- chargeBoyd pleaded not guilty to threatening Megan Rock with death or serious harm (dublinlive.ie)
- chargeBoyd pleaded not guilty to assaulting Megan Rock causing her harm (dublinlive.ie, irishmirror.ie)
- chargeHarcourt pleaded not guilty to impeding the apprehension or prosecution of the person who caused serious harm (dublinlive.ie)
- chargeHarcourt pleaded not guilty to impeding the apprehension or prosecution of the person who committed murder at Blanchardstown Garda Station (dublinlive.ie)
- chargeChantelle Harcourt stands accused of impeding Boyd's prosecution (irishmirror.ie)
- chargeThe prosecution case is that Boyd stabbed the deceased with the intention of killing him or causing him serious harm (irishmirror.ie)
- chargeBoyd pleaded not guilty to murdering Mark Carroll at his home on June 9, 2024 (irishmirror.ie)
- chargeBoyd pleaded not guilty to making a threat to kill Megan Rock or cause her serious harm (irishmirror.ie)
- chargeBoyd pleaded not guilty to assaulting Ms Rock, causing her harm (irishmirror.ie)
- chargeHarcourt pleaded not guilty to impeding prosecution at Blanchardstown Garda Station (irishmirror.ie)
- chargeChantelle Harcourt stands accused of impeding his prosecution. (irishmirror.ie)
- chargeHarcourt pleaded not guilty to impeding the apprehension or prosecution of Boyd at the scene. (irishmirror.ie)
- chargeHarcourt pleaded not guilty to impeding the apprehension or prosecution of Boyd at Blanchardstown Garda Station. (irishmirror.ie)
- courtMegan Rock will be a witness in the case. (irishmirror.ie, dublinlive.ie)
- courtA jury of seven men and five women was sworn in to hear the trial. (irishmirror.ie)
- courtThe trial will begin before Ms Justice Melanie Greally on Wednesday morning and is expected to last three weeks. (irishmirror.ie, dublinlive.ie)
- courtBoth were arraigned before the Central Criminal Court on Monday afternoon (dublinlive.ie)
- courtA jury of seven men and five women was sworn in (dublinlive.ie)
- courtDerek Boyd is on trial at the Central Criminal Court charged with the murder of Mark Carroll (irishmirror.ie)
- courtThe trial continues before Ms Justice Melanie Greally and a jury of seven men and five women. (irishmirror.ie)
- otherDerek Boyd also has an address at Collins Place in Finglas. (irishmirror.ie)
- otherDerek Boyd is in a relationship with Chantelle Harcourt. (irishmirror.ie)
- otherMegan Rock was Mark Carroll's partner. (irishmirror.ie, dublinlive.ie)
- otherBoyd is in a relationship with Harcourt (dublinlive.ie)
- otherCCTV footage shows Mark Carroll running from the house with his hand on his chest after suffering a fatal injury (irishmirror.ie)
- otherHarcourt is alleged to have made an effort to clean the scene before gardaí arrived (irishmirror.ie)
- otherProsecuting counsel said in a sense five different trials are happening at once (irishmirror.ie)
- otherBoyd and Harcourt had spent several hours in the company of Carroll and his partner Megan Rock over the previous day (irishmirror.ie)
- otherA significant volume of alcohol and some cocaine had been consumed during the day (irishmirror.ie)
- otherThe two women left the house before midnight and went to a nearby garage, returning shortly after midnight (irishmirror.ie)
- otherAll four persons were back in the house for up to 35 minutes, remaining until about 00.45 (irishmirror.ie)
- otherSome falling out occurred during this period, resulting in Carroll and Rock leaving the house (irishmirror.ie)
- otherThe couple returned to Scribblestown Place and within three or four minutes Carroll went back into the house while Rock remained outside (irishmirror.ie)
- otherThe prosecution will not adduce direct evidence of what happened in the house during those seven minutes (irishmirror.ie)
- otherBoyd purchased a bottle of Jameson whiskey and eight bottles of WKD Blue at an off licence next to The Village Inn. (irishmirror.ie)
The reporting
newest first- 2 Jul2026Trial jury watches CCTV of moment man who was fatally stabbed ran from house
Jury watched CCTV footage showing the sequence of events on the night of the murder, including Mark Carroll running from the house clutching his chest and Derek Boyd following. The prosecution case is that Boyd stabbed Carroll with intent to kill or cause serious harm during a seven-minute window. Harcourt is alleged to have attempted to clean the scene before gardaí arrived. The trial continues before Ms Justice Melanie Greally.
victim, Mark Carroll, 34, male, irish (judged from name)Mark Carrollvictim, Megan Rock, female, irish (judged from name)Megan Rockaccused, Derek Boyd, 31, male, named, irish (judged from name)Derek Boydaccused, Chantelle Harcourt, 34, female, named, irish (judged from name)Chantelle Harcourt - 2 Jul2026Murder trial jury told there is CCTV footage of stabbed man running from house
Details from prosecuting counsel Sean Guerin SC's opening address: CCTV evidence, full timeline of the evening, cause of death (three stab wounds, fatal wound to thorax penetrating ribs and heart), the knife found at the front door excluded as murder weapon, and the two counts of assisting an offender against Harcourt (cleaning the house and making a false statement at Blanchardstown Garda Station). Trial before Ms Justice Melanie Greally, expected to last three weeks.
victim, Mark Carroll, 34, male, irish (judged from name)Mark Carrollvictim, Megan Rock, female, irish (judged from name)Megan Rockaccused, Derek Boyd, 31, male, named, irish (judged from name)Derek Boydaccused, Chantelle Harcourt, 34, female, named, irish (judged from name)Chantelle Harcourt - 30 Jun2026Couple facing trial in connection with alleged murder of man at Dublin residence
Reports the arraignment, not-guilty pleas, jury selection, and trial details including the presiding judge and expected duration.
victim, Mark Carroll, 34, male, irish (judged from name)Mark Carrollvictim, Megan Rock, female, irish (judged from name)Megan Rockaccused, Derek Boyd, 31, male, named, irish (judged from name)Derek Boydaccused, Chantelle Harcourt, 34, female, named, irish (judged from name)Chantelle Harcourt - 29 Jun2026Couple facing trial in connection with alleged murder of man at Dublin residence
Reports the arraignment, not-guilty pleas, jury selection, and trial logistics including the presiding judge and expected three-week duration.
victim, Mark Carroll, 34, male, irish (judged from name)Mark Carrollvictim, Megan Rock, female, irish (judged from name)Megan Rockaccused, Derek Boyd, 31, male, named, irish (judged from name)Derek Boydaccused, Chantelle Harcourt, 34, female, named, irish (judged from name)Chantelle Harcourt