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Warning: This article contains details and language that readers may find disturbing.
Court exposes elaborate murder plot after three-year investigation
Stephen McCullagh, a 36-year-old content creator, was convicted of murdering his pregnant partner, Natalie McNally, after a five-week trial revealed a meticulously constructed alibi that ultimately collapsed under scrutiny. The case, described by prosecutors as cold-blooded and calculated, hinged on digital evidence and CCTV footage that dismantled McCullagh's claims of innocence.
The alibi: A pre-recorded deception
On the evening of December 18, 2022, McCullagh streamed what appeared to be a live six-hour gaming session on YouTube, titled Violent Night. The broadcast showed him playing Grand Theft Auto: Vice City and Robot Wars, drinking, and vaping while addressing an audience. However, forensic analysis later confirmed the stream was pre-recorded four days earlier. The file was abruptly stopped at 00:05 on December 19 and deleted shortly after.
During the stream, McCullagh made several unsettling remarks, including singing, "I need to kill this bitch, I need to take her down," during a mission requiring the player to murder a woman. Ten minutes later, he uttered, "Abso-fucking not-ally, abso-fucking Natalie," his only direct reference to McNally during the broadcast. A poster for the film No Time To Die briefly appeared on screen during a break, though its significance remains unexplained.
McCullagh did not testify during the trial, leaving his motives and the meaning behind these references unaddressed.
The murder and the cover-up
While the pre-recorded stream aired, McCullagh traveled from his home in Lisburn to Lurgan, approximately 20 miles away. Dressed in dark clothing, gloves, and a face covering, he carried a green shopping bag and followed a route he had researched earlier, including bus and train timetables. CCTV footage captured his journey to McNally's home at Silverwood Green, where she was stabbed, strangled, and struck at least five times in the head between 20:50 and 21:30.
After the killing, McCullagh changed his clothes and attempted to return home. When he missed the last bus, he convinced a taxi driver he was the passenger who had booked the fare, redirecting the ride to his own address in Lisburn. Upon arriving, he stopped the stream and deleted the pre-recorded file.
Prosecutors presented CCTV images of McCullagh wearing a black hat and wig, resembling footage of a man walking through Lurgan town center after the murder. Social media photos of McCullagh in similar attire were also shown to the jury.
The aftermath: Grief and manipulation
Following the murder, McCullagh sent messages to McNally's phone and a friend, suggesting she might be upset with him for drinking during her pregnancy and hinting at complications with her diabetes. He also posted a video review of a Star Wars lightsaber toy, further embedding his alibi.
The next day, McCullagh traveled to Lurgan and called emergency services from McNally's home, sobbing as he reported finding her body. He performed CPR and told police an "abusive ex-partner" was responsible. Despite his emotional display, prosecutors argued it was an act. McCullagh was arrested at the scene but released after police initially accepted his alibi.
In the weeks that followed, McCullagh played the role of a grieving partner. He attended McNally's wake, spent time alone with her body, visited her grave, and messaged her brothers regularly. He created a tribute video from old home videos, which was played at a rally in her honor. He even left his phone in the McNally family home for 39 minutes to record private conversations, claiming it was due to a technical glitch. The court heard he had previously recorded a private counseling session of a former partner using the same tactic.
Motive and conviction
McCullagh's motive remains unclear, as he did not testify or offer an explanation during the trial. However, the court heard that McNally had been messaging other men in the months leading up to her death, some of which were sexually explicit. A week before her murder, she told one of these men she was considering ending her relationship with McCullagh after the New Year. Prosecutors suggested McCullagh had accessed her phone and read these messages.
This was not the first time McCullagh had reacted violently to a partner's messages. He had previously been arrested for assaulting an ex-girlfriend after reading messages on her phone. Despite these clues, jealousy alone does not fully explain the extent of his calculated plan, which prosecutors described as a "house of cards" that eventually collapsed under the weight of digital and forensic evidence.
"The meticulous planning and cold execution of this murder demonstrate a level of premeditation that is chilling," a prosecutor told the jury.
Justice for Natalie
McCullagh's YouTube channels were removed by the platform following his conviction. The pre-recorded stream, which had been demonetized but remained online throughout the trial, was played for the jury. It included references to violence, crime, and relationships, further undermining his claims of innocence.
On the night of the murder, McNally had been watching the World Cup final with her family before driving home around 19:00. She exchanged messages with McCullagh shortly before his stream, telling him she would try to "sneak a peek" at it. Her last known communication was a brief interaction with him, unaware of the horror that awaited her.
