Robotics Student Pleads Guilty to 'Cold-Blooded Execution' of Housemate

Zack Coughlan, a 23-year-old university robotics student, has pleaded guilty to murder in the stabbing death of his housemate, Jamie Collins, 21. The attack, described by prosecutors as a "carefully planned and cold-blooded execution," occurred on April 8 at their shared home in Filton, South Gloucestershire.

Coughlan appeared in court dressed in black, wearing a mask and gloves, to carry out the ambush in the garden of their residence. He repeatedly stabbed Collins before leaving him to die in an alleyway and cycling away on Collins's bike. The dispute between the two students reportedly centered on the amount of rent Coughlan was charging Collins.

A murder trial was initiated at Bristol Crown Court after Coughlan initially denied the charge. However, he has since changed his plea to guilty and is scheduled for sentencing. The court heard that Coughlan dumped Collins's bicycle at a retail park, purchased a change of clothes, and disposed of his bloodstained garments in a pond, weighing them down with bricks.

He returned to the house around 9 p.m., prepared a pizza, and engaged in online gaming with friends. Around 2 a.m. the following morning, Coughlan called emergency services, claiming to have just discovered Collins's body.

CCTV footage from the house captured the attack, and Coughlan initially showed the footage to police officers who treated him as a witness. Investigations revealed Coughlan's blood on Collins's bike, and mobile phone data corroborated Coughlan's movements after the murder, matching CCTV evidence. Coughlan also sustained injuries to his hands, which he explained to others as the result of falling while climbing trees.

Following the murder, Coughlan reportedly told a university friend that he wanted to organize a memorial for Collins. During the trial, Coughlan claimed he had no choice but to stab Collins, fearing for his life. However, Senior Investigating Officer Lucy Edgeworth stated that no evidence supported this claim. Edgeworth noted that Coughlan's account was inconsistent, as a third housemate heard nothing, which seemed unlikely if Coughlan's claims of fear were true. She added that Coughlan was socializing in the living room hours before the murder while Collins was home, an action inconsistent with someone fearing for their life.

Edgeworth concluded that Coughlan repeatedly lied to protect himself and that the jury recognized these fabrications. The victim, Jamie Collins, was from Swansea and was described by his family as a bright, kind, and gentle young man with his entire life ahead of him. He was nearing the completion of his university journey in robotics and engineering and was planning to return home soon.