Murder Most British
Rachel & Zach
Ep 43 - The Livestream Lie - The Murder of Natalie McNally
In this episode of Murder Most British, hosts Zach and Rachel examine the tragic murder of Natalie McNally, a 32-year-old woman who was 15 weeks pregnant when she was killed in her home in December 2022. The hosts explore how the perpetrator, Stephen McCullough, attempted to orchestrate a sophisticated digital alibi by pre-recording a gaming livestream to make it appear as though he were at home during the time of the attack. The discussion highlights the chilling contrast between McCullough’s online persona as an enthusiastic, nerdy YouTuber and the cold, calculated nature of his actions. The hosts detail how investigators systematically dismantled his fabricated alibi by analyzing transport data, CCTV footage, and digital forensics. McCullough’s attempts to manipulate the narrative—including planting a recording device in the victim’s family home and attempting to gain insider information on the police investigation—are examined as evidence of his desperate efforts to evade detection. This episode provides a somber look at the intersection of domestic violence and modern technology, focusing on the meticulous police work required to uncover the truth behind a carefully constructed deception.
Updated Jul 6, 2026
About This Episode
“In a home in Northern Ireland, a camera was turned on — but what it showed wasn’t the truth.”
In 2022, concern began to grow around the disappearance of a young pregnant woman. Messages had stopped. Contact had faded. And those closest to her were left trying to understand what had changed — and when.
At the centre of it was Stephen McCullagh — a local YouTuber who, at first, appeared to account for his movements in an unusual way. A livestream. A visible presence. A digital alibi that seemed, on the surface, to place him somewhere else entirely.
But as investigators began to examine timelines more closely, the sequence of events no longer aligned as cleanly as it first appeared. The livestream itself became part of the enquiry — not as confirmation, but as something to be tested, questioned, and ultimately dismantled.
What followed was a case built on reconstruction: of movements, of digital evidence, and of a narrative that had been carefully put forward — but could not withstand scrutiny.
This week, the Archive examines a crime shaped by deception in the digital age — where presence could be manufactured, and where the truth had to be uncovered frame by frame.
Some alibis are built to be seen. Others are built to mislead.
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SOURCES
Belfast Telegraph - Natalie McNally killer posed as journalist and called Policing Board MLA in bid to obtain information on murder probe https://www.belfasttelegraph.co.uk/sunday-life/news/natalie-mcnally-killer-posed-as-journalist-and-called-policing-board-mla-in-bid-to-obtain-information-on-murder-probe/a/144698071.html
Belfast Telegraph - ‘Target on his back’: Stephen McCullagh being held on Maghaberry Prison’s hospital wing over fears of revenge attack https://www.belfasttelegraph.co.uk/sunday-life/target-on-his-back-stephen-mccullagh-being-held-on-maghaberry-prisons-hospital-wing-over-fears-of-revenge-attack/a/144491942.html
Irish Independent - From nerd to cold killer: colleague of murderer Stephen McCullagh reveals chilling transformation of monster he thought he knew https://www.independent.ie/irish-news/crime/from-nerd-to-cold-killer-colleague-of-murderer-stephen-mccullagh-reveals-chilling-transformation-of-monster-he-thought-he-knew/a206542404.html
ITV NEWS - Natalie McNally partner Stephen McCullagh guilty of murder: Timeline of events https://www.itv.com/news/utv/2026-03-23/from-dating-app-to-cold-blooded-murder
ITV NEWS - Jury finds Stephen McCullagh guilty of murdering Natalie McNally https://www.itv.com/news/utv/2026-03-23/jury-in-natalie-mcnally-murder-trial-retires-to-consider-verdict
ITV NEWS - Killer Stephen McCullagh ‘very manipulative, very cold and calculated’ https://www.itv.com/news/utv/2026-03-23/star-witness-who-helped-unpick-murderers-conspiracy
ITV NEWS - Natalie McNally’s brothers pay tribute to strength of parents after guilty verdict https://www.itv.com/news/utv/2026-03-23/natalie-mcnally-brothers-pay-tribute-to-strength-of-parents-after-guilty-verdict
ITV NEWS - Prosecution in Natalie McNally murder trial tells jury Stephen McCullagh ‘lied and lied again’ https://www.itv.com/news/utv/2026-03-18/he-lied-and-lied-again-prosecution-delivers-closing-statement-in-murder-trial
ITV NEWS - Evidence in Natalie McNally murder trial points to ‘some other killer’ https://www.itv.com/news/utv/2026-03-19/murder-trial-told-evidence-points-to-some-other-killer
ITV NEWS - Natalie McNally considered breaking up with murder accused days before she was killed, court hears https://www.itv.com/news/utv/2026-03-13/natalie-mcnally-considered-breaking-up-with-murder-accused-court-hears
ITV NEWS - Natalie McNally murder accused made ‘no comment’ response over 80 times to police https://www.itv.com/news/utv/2026-03-02/murder-accused-denies-killing-natalie-mcnally-and-tells-court-her-ex-was-abusive
ITV NEWS - Natalie McNally: Chilling footage from UTV shows killer at victim’s vigil https://www.itv.com/news/utv/2026-03-27/killer-at-large-chilling-footage-shows-murderer-at-natalie-mcnallys-vigil
BBC News - Man released after Natalie McNally found dead in Lurgan https://www.bbc.com/news/uk-northern-ireland-64036113
BBC News - Natalie McNally: Police revisit Lurgan murder scene https://www.bbc.com/news/uk-northern-ireland-64200914
BBC News - Natalie McNally: Suspect seen in victim’s street on night of Lurgan stabbing https://www.bbc.com/news/uk-northern-ireland-64069346
BBC News - Murder accused’s tearful 999 call was an act, prosecution claims https://www.bbc.com/news/articles/c2d1jp8d7ryo
BBC News - Pathologist says Natalie McNally endured prolonged assault https://www.bbc.com/news/articles/c0q3l33nwp1o
BBC News - Evidence gaming broadcast was pre-recorded, murder trial hears https://www.bbc.com/news/articles/cj6dx390y3zo
BBC News - Family comforted murder accused after Natalie McNally’s death https://www.bbc.com/news/articles/cj9883njdnmo
BBC News - Murder accused was ‘inconsolable’ the night Natalie McNally was killed, friend says https://www.bbc.com/news/articles/c1w55rjq720o
RTÉ - Jury sworn in at Natalie McNally murder trial https://www.rte.ie/news/ulster/2026/0216/1558769-stephen-mccullagh-court/
RTÉ - Murder trial told ex-partner was harassing McNally https://www.rte.ie/news/regional/2026/0302/1561221-stephen-mccullagh-trial/
RTÉ - Ex-partner of McNally murder accused says he assaulted her https://www.rte.ie/news/ulster/2026/0306/1561993-stephen-mccullagh-court/
RTÉ - ‘You killed her,’ says Natalie McNally’s ex-partner in court https://www.rte.ie/news/2026/0309/1562456-natalie-mcnally-court/
RTÉ - Jury shown police interview with man accused of murdering McNally https://www.rte.ie/news/courts/2026/0313/1563324-natalie-mcnally-court/
The Guardian - A live stream lie unravelled: how Stephen McCullagh tried to get away with pregnant girlfriend’s murder https://www.theguardian.com/uk-news/2026/mar/23/stephen-mccullagh-livestream-lies-natalie-mcnally-murder
The Guardian - Man who used false gaming alibi found guilty of Natalie McNally’s murder https://www.theguardian.com/uk-news/2026/mar/23/man-false-gaming-alibi-found-guilty-natalie-mcnally-murder
The Guardian - Man accused of Natalie McNally’s murder beat previous partner, court told https://www.theguardian.com/uk-news/2026/mar/06/man-accused-of-natalie-mcnallys-beat-previous-partner-court-told
Irish News - Natalie McNally: Murder accused’s YouTube channel gains thousands of new subscribers following charge https://www.irishnews.com/news/northern-ireland/natalie-mcnally-murder-accuseds-youtube-channel-gains-thousands-of-new-subscribers-following-charge-CS2WZ73YQRE27OH7HJJSCTHVAU/
Irish Independent - Digital forensic analyst tells trial murder accused’s ‘live stream alibi’ was pre-recorded days before Natalie McNally was killed https://www.independent.ie/irish-news/digital-forensic-analyst-tells-trial-murder-accuseds-live-stream-alibi-was-pre-recorded-days-before-natalie-mcnally-was-killed/a954312861.html
Irish Independent - Natalie McNally’s ex-boyfriend arrested last week ‘over threats to kill woman’, court hears https://www.belfasttelegraph.co.uk/news/northern-ireland/natalie-mcnallys-ex-boyfriend-arrested-last-week-over-threats-to-kill-woman-court-hears/a/140398856.html
Irish Legal News - Murder trial to continue despite barristers’ strike https://www.irishlegal.com/articles/murder-trial-to-continue-despite-barristers-strike
Wikipedia - Murder of Natalie McNally https://en.wikipedia.org/wiki/Murder_of_Natalie_McNally
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