Stephen McCullagh thought he had committed the perfect crime. The 36-year-old YouTuber from Lisburn meticulously planned the murder of his 32-year-old pregnant girlfriend Natalie McNally, staging an elaborate alibi using a pre-recorded gaming livestream. On December 18, 2022, while Natalie was being subjected to a frenzied and brutal attack in her Lurgan home, McCullagh’s YouTube channel appeared to show him casually streaming Grand Theft Auto from his own house, complete with a Santa hat, snacks, and casual banter.

The horrifying reality that unfolded shocked Northern Ireland and beyond. Natalie, who was 15 weeks pregnant, suffered multiple stab wounds to the neck, traumatic blows to the head, and signs of strangulation and choking. The attack was so vicious that her face was reportedly left in a dog bowl. McCullagh’s cold calculation before, during, and after the killing revealed a level of premeditation rarely seen in domestic violence cases.

The pair had met on the dating app Bumble in August 2022. Their relationship moved quickly — within months they announced a pregnancy to family and friends. But beneath the surface, McCullagh was jealous and controlling. He had accessed Natalie’s phone and discovered messages with other men, fueling his rage. In the weeks leading up to the murder, he began laying the groundwork for his alibi by pre-recording a six-hour-plus gaming session on December 14-15.

On the evening of December 18, McCullagh messaged Natalie that he was “off to stream the night away.” At 5:57pm, as she replied wishing him luck, he activated the pre-recorded video. His phone went inactive. CCTV footage later captured a disguised figure — hooded, face covered, wearing black gloves over yellow ones — leaving the area near his home, boarding a bus from Dunmurry to Lurgan, and making his way to Natalie’s house at Silverwood Green. He entered at 8:51pm and left at 9:31pm.

While the fake livestream played to his subscribers, McCullagh carried out the savage attack. Natalie had even logged into YouTube to watch part of what she believed was his live session, completely unaware that her boyfriend was in her own home committing murder. After the killing, he took a taxi back to Lisburn, disposed of items over a hedge, and reactivated his phone.

The next day, McCullagh continued his twisted performance. He sent concerned messages to Natalie’s phone: “Are you ok?”, “Getting a little worried,” and “Very concerned now.” In the evening, he went to her home, “discovered” her body, and made a 10-minute 999 call filled with fake sobs and pleas. He cried that she was pregnant, cold, and that there was “blood everywhere.” When asked if she was breathing, he wailed, “No, she’s gone.” The call was later revealed as pure theater.

For weeks, McCullagh maintained his innocence. He told police he was streaming live at the time and even tried to point suspicion toward Natalie’s ex-partner. He attended her wake, ingratiating himself with her grieving family while secretly recording their private conversations. But meticulous police work dismantled his house of cards. Thousands of hours of CCTV, bus footage, taxi records, phone data, and digital forensics proved the livestream was pre-recorded. His phone activity, travel timeline, and physical evidence linked him directly to the scene.

In March 2026, a jury unanimously convicted McCullagh of murder after a short deliberation. On June 3, 2026, he was sentenced to life imprisonment with a minimum term of 31 years. The judge described the killing as brutal and frenzied. Prosecutors called it one of the most premeditated domestic murders they had ever encountered, noting the disguise, forensic awareness, framing of an innocent person, and the elaborate fake alibi.

Natalie’s family spoke movingly after the sentencing. Her father expressed the unimaginable pain they have endured, thanking the community, police, and prosecution for their support. He described the family as now serving a lifetime sentence of grief, hoping the outcome serves as a deterrent against violence toward women and girls.

The case has sparked widespread discussion about domestic abuse, online deception, and the dangers hidden in seemingly normal relationships. McCullagh’s actions — from the calculated planning to the fake tears and attempts to manipulate the investigation — paint a portrait of a cold, manipulative individual who showed no remorse.

Investigators highlighted how CCTV evidence was crucial in tracking McCullagh’s every movement: boarding the bus with his face covered, walking toward Natalie’s estate, and returning home. The contrast between the calm “gamer” on the fake livestream and the killer moving through the night is chilling.

Natalie McNally was remembered as a vibrant young woman full of life, excited about her pregnancy and future. Her death at just 32, along with the loss of her unborn child, devastated everyone who knew her. The community in Lurgan and beyond rallied around her family, offering support during the long legal process.

This case stands as a stark warning. McCullagh’s elaborate plot ultimately failed due to modern technology and determined policing. His YouTube subscribers, who once enjoyed his gaming content, were unwittingly part of a murder alibi scheme. The fake 999 call, once thought to show a distraught partner, now serves as damning evidence of his guilt.

As Stephen McCullagh begins his life behind bars, Natalie’s memory lives on through her family’s advocacy and the public outrage over her senseless killing. The story reminds us how quickly trust can be betrayed and how important it is to recognize warning signs in relationships. Justice has been served, but for Natalie’s loved ones, the pain remains eternal.