Derek Boyd is on trial at Ireland’s Central Criminal Court accused of murdering Mark Carroll in north Dublin. According to reports, Boyd gives evidence describing the incident as an “instinct” response during a confrontation with the man, whom he says had come into his home after drinking together earlier. Boyd tells the jury he picked up a knife and urged Carroll to leave, “begging” him to go, but that the deceased repeatedly threatened to kill him.

The accounts also note that Boyd’s partner, Chantelle Harcourt, is accused of impeding Boyd’s prosecution. The trial focuses on what led to the fatal stabbing, including the sequence of events inside the property and whether Boyd’s actions were driven by fear or the circumstances presented in his testimony. The reports reflect the defence position as recounted in court evidence, with the prosecution case not detailed in the provided excerpts. The case remains for the jury to decide based on the evidence presented.