Courts / Dublin / Report

Murder accused was on suspended sentence for killing sister when he's alleged to have fatally stabbed man, jury hears

Date
2026-07-06

Stage
Sentence

Primary locality
Dublin

County
Dublin

Summary

Derek Boyd, a garda accused of murdering his partner Mark Carroll, was on a suspended sentence for the manslaughter of his sister when the alleged killing took place. The Central Criminal Court heard that Boyd and his partner Chantelle Harcourt are accused of impeding the prosecution by cleaning the scene. Megan Rock, Carroll's partner, testified that the evening was initially peaceful but turned violent when Boyd and Carroll had an argument. Rock said that Boyd threatened her and tried to set his dog on her, but she managed to escape. She denied that Carroll was a violent person and said that Boyd had previously shot his sister in a tragic accident. Boyd's legal team argued that he had a suspended sentence and was aware of the consequences of any physical altercation. The trial continues with the jury considering the evidence presented, including the alleged threats and the circumstances surrounding the murder. Derek Boyd pleaded guilty.

Who, what, where, when and why

What: Report matter: Murder accused was on suspended sentence for killing sister when he's alleged to have fatally stabbed man, jury hears. Charges or matters: the manslaughter of his sister?" counsel put it to the witness; murdering Mark Carroll (34) at his home on June 9, 2024. Procedural stage: sentence

When:

June 8, 2024 Hearing Or Sentence
June 11 Other
June 9, 2024 Other
2026-07-06 Publication

Case subjects

Chantelle Harcourt

Accused

Derek Boyd

Accused

Charges: the manslaughter of his sister?" counsel put it to the witness; murdering Mark Carroll (34) at his home on June 9, 2024 (Admitted)

Plea: Guilty

Outcome: Derek Boyd was on a suspended sentence for shooting his sister dead "in a tragic accident" when he is alleged to have fatally stabbed another man in the chest at his home in north Dublin, a Central Criminal Court jury has heard. Mr Grehan told the witness that Mr Boyd had received a sentence for that, which Ms Rock agreed with.