BELFAST —
Jurors at Belfast Crown Court on Wednesday watched excerpts of what prosecutors called a “so-called” live YouTube gaming broadcast that the man accused of murdering Natalie McNally allegedly used to “peddle a false alibi,” deepening a closely watched Northern Ireland trial testing how digital footprints are weighed in the dock. Stephen McCullagh, 36, denies killing Ms McNally, 32, who was 15 weeks pregnant when she was attacked at her Lurgan home on December 18, 2022.
The court was told the video — titled The Violent Night Christmas Live Gaming Stream — appeared to run for six hours from 6pm to midnight on the night Ms McNally died, but had in fact been recorded days earlier. McCullagh, sitting in the dock, watched as the jury of six men and six women viewed around 90 minutes of the footage.
A live‑streamed alibi on trial
The case is resonating far beyond Northern Ireland because it centers on whether a carefully staged online performance can be dismantled by forensic analysis and traditional investigative work. Around the world, courts are increasingly asked to authenticate social‑media and streaming content — a challenge amplified by the ease of editing digital video and the blurred line between “live” and scheduled broadcasts. In this instance, police cyber specialists concluded the stream was not live, and prosecutors argue the faked session formed a deliberate cover story intended to place McCullagh at home at the precise time Ms McNally was killed.
What jurors saw and heard
Wearing a Santa hat and sipping Guinness and Baileys as he played Grand Theft Auto: Vice City, McCullagh repeatedly framed the session as a live event. “I’m going to drink during this live stream … I’m going to drink and drive in the game,” he said at one point. “I’m not leaving the house tonight.” He also told viewers he “can’t look at the live chat for some bloody reason” and asked them to “chat amongst” themselves. “I’m a very angry gamer by the way,” he added, before declaring he would “call it a night” at midnight. “It’ll be a really good f***ing Christmas this year,” he said.
“Hey and we’re live…hello, hello to all on this glorious Sunday evening. Yeah, I just thought, why not, I’m going to do a live stream because this day next week is Christmas.”
Prosecutor Charles MacCreanor KC introduced the footage and described the broadcast to jurors as a “so‑called live stream,” alleging it underpinned a “false alibi.” The panel also saw crime‑scene exhibits: a small black‑handled knife found beside the victim, a silver dog bowl, and a sheet of diabetes information recovered near the body.
Key times under scrutiny
Investigators have placed Ms McNally’s time of death between 8.50pm and 9.30pm on December 18, 2022. Messages disclosed in court trace the evening’s chronology in the hours before that window, including her 5.55pm text after watching the World Cup final — “Argentina win it, I’m crying…” — and McCullagh’s 5.57pm reply: “Right, I’m off to stream the night away. Wish me luck.” Her final reply at 5.59pm read: “Good luck. I might have a peek at your live stream later”.
- 6pm–midnight, Dec 18, 2022: Video titled The Violent Night Christmas Live Gaming Stream appears online as a live session, which the accused later admits was pre‑recorded.
- 8.50pm–9.30pm: Estimated time of death at Ms McNally’s home in Silverwood Green, Lurgan.
- Late Jan 2023–Feb 2, 2023: After initial inquiries, McCullagh is rearrested; on February 2 he submits a pre‑prepared statement admitting the footage was pre‑recorded.
Additional WhatsApp messages presented to jurors showed the accused attempting contact the following day. At 4.09pm on Monday, December 19, he wrote: “I love you and I don’t want to do anything to hurt or upset you,” and later said he was “getting a little worried” when she did not reply. At 9.31pm he messaged to say he was going to her house. All messages went unanswered, the court heard.
A digital alibi under forensic scrutiny
The prosecution contends the stream was recorded in advance to create the impression of presence at home while the killing was carried out off‑camera; the defence maintains McCullagh did not commit the crime. Cyber‑forensic work by the Police Service of Northern Ireland, including analysis of file metadata and platform logs, was described in court as central to unravelling the claimed alibi — an illustration of how UK courts increasingly rely on technical analysis to establish the timing, authorship and integrity of online material.
Under the rules governing criminal trials in Northern Ireland, including the duty to prove guilt “beyond reasonable doubt” set out in the Juries (Northern Ireland) Order 1980, the admissibility and weight of digital evidence are ultimately for the judge and jury to determine. Majority verdicts are permitted after sufficient deliberation, but juries of 12 remain the norm and trials are presumptively by jury. Legal observers say the McNally case will be closely watched for how far jurors are prepared to rely on technical assessments of online content when a defendant’s liberty turns on whether a stream was truly “live”.
The wider stakes: violence against women and girls
Ms McNally’s killing occurred amid persistent concern across the UK and globally about gender‑based violence, most often perpetrated by partners or former partners and frequently committed in the home. UN agencies estimate that in 2023 an average of 140 women and girls were killed each day by intimate partners or family members worldwide, while UK monitoring has repeatedly found that women are most likely to be killed by a current or former partner.
Official figures in Northern Ireland show domestic‑abuse homicides remain a small but stubborn share of overall violence; for the year ending March 31, 2025, six domestic‑abuse homicides were recorded, all of them female. Campaigners and authorities say better early‑warning systems, survivor support, and evidence‑led policing — including robust handling of digital trails such as messages, location data and online posts — are critical to prevention and prosecution. For legislators and criminal‑justice agencies, the case underscores how rapidly evolving online behaviour is colliding with efforts to detect, deter and punish violence against women and girls.
What has happened procedurally
McCullagh, from Woodland Gardens in Lisburn, County Antrim, was first arrested on the night of the murder, when he told police he had been at home hosting the stream. He was rearrested on January 31, 2023, and charged at Lisburn Magistrates’ Court on February 2, 2023, after admitting the broadcast was pre‑recorded. He has been denied bail in prior proceedings and continues to contest the charge, which carries a mandatory life sentence on conviction.
Status: The jury at Belfast Crown Court remains empanelled and the trial continues, with further expert and factual evidence expected before the panel is asked to reach a verdict.
