The most dangerous crime drama on TV? Wannabe killer is now linked to hit show Dexter after at least SEVEN convicted murderers are influenced by the 'how-to script' of gruesome on-screen slayings, warns criminologist

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Parashar, A., & Brady, J. (2026, October 23). The most dangerous crime drama on TV? Wannabe killer is now linked to hit show Dexter after at least SEVEN convicted murderers are influenced by the 'how-to script' of gruesome on-screen slayings, warns criminologist. Daily Mail. https://www.dailymail.com/crime-desk/article-16229425/dexter-crime-drama-wannabe-killer-linked.html?ns_mchannel=rss&ns_campaign=1490&ito=1490

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Daily Mail · collected 2026-10-23 · by Arthur Parashar, Jon Brady

Quick Summary

Criminologists warn that the TV show Dexter may be inspiring real-world violence, with at least seven convicted murderers and one attempted murder linked to the series since its debut in 2009. The cases include recent incidents where killers were found to have been influenced by Dexter's depiction of a vigilante serial killer, adopting similar methods and attire for their crimes. Alex Iszatt, a behavioral criminologist, suggests that Dexter provides a "how-to script" for would-be murderers, offering them rituals and methods used in the show to commit and cover up murders.
Written locally by qwen2.5:14b on 2026-10-23, using this article's own text rather than the other coverage of the same event (that is the story summary below).

AI analysis runs on qwen2.5:14b, locally

Story summary

Benjamin Day, a 20-year-old forensics student, was arrested and charged with the murder of Maria Saceanu, 24, in October 2026. Inspired by the TV show Dexter, Day lured Saceanu to an Airbnb in the West Midlands where he murdered her in a "kill room" designed as a tribute to the series. Earlier in the year, another British teen was convicted of attempting to murder a girl at Thorpe St Andrew School while wearing a Dexter-style outfit, showing a disturbing trend linked to the show's influence on real-life crimes. Criminologists warn that Dexter, which has aired for 20 years and spawned three spin-offs, may be providing a "how-to script" for copycat killers. This concern is heightened by cases involving Canadian filmmaker Mark Twitchell and British teen Steven Miles, who were also inspired to kill by the show.

Written for “Dexter Influence On Murders” on 2026-10-23, grounded in this article and the 0 other(s) covering the same event.
Why this leaning score
This article does not take a side on a contested political question, so it has no leaning score. That is an answer rather than a gap: a match report or a rescue can be warmly or critically written without being left or right, and scoring it anyway is how approval of a subject gets recorded as a political position.
No political leaning scored for article 100831 · logged 2026-10-23

Story

📰 Dexter Influence On Murders
Crime & Law · 1 article(s) covering the same event.

Compared with similar articles

This article reads unscored and hedges 2% of its claims. Each row says how that neighbour differs.
Daily Mail
⚖️ leaning not scored 🔴 0% hedged 0 of 27 📰 publisher trust 64
“While both articles mention a 15-year-old boy convicted of attempted murder at Thorpe St Andrew School, Article A focuses on his disturbing videos and obsessions, while Article B discusses the broader influence of the TV show Dexter on real-world violence. They are related but describe different aspects of the event.”
How this article was measured signals, leaning charts, publisher record, byline, topics and claims

Signals How these are calculated →

Claims extracted
92
sentences that state something as happening or true
Uncertain
2%
2 of 92 hedged ("reportedly", "may", "according to")
Leaning
not political
takes no side on a contested political question
Publisher signals
64/100
Daily Mail's corrections and hedging, across everything collected from it. Not a measure of accuracy.
Outlets on this story
1
Crime & Law
Same framing elsewhere
1
articles that frame the event the way this one does
Analyzed 2026-10-23 · how these are computed

How this is being covered How these are calculated →

Article leaning vs. publisher reliability
Source leaning vs. consistency

Publisher

Daily Mail · 7043 article(s) · 15 correction(s) detected
Running correction rate · 15 correction(s)

Who wrote this

Arthur Parashar
7 article(s) here · 1 carrying a prediction
🔮 Criminologists have warned that the show – which has produced three spin-offs – could be providing a 'how-to script' for copycat killers and would-be murderers.
🔮 Criminologists have today warned that Dexter – which has produced three spin-off shows – could be providing a 'how-to script' for copycat killers.
🔮 Another tactic police are aware of is thieves putting mayonnaise on their victims' clothes, pretending it is bird poo as a distraction while another criminal steals their luggage.
🔮 According to local media, the victims would take the cash and gold to their homes before a courier would come to them with a codeword and take the delivery away.
🔮 'We will never have peace unless we find out the cause of her death and who is to blame for this catastrophic outcome. '
🔮 Since the Home Office proposals in June, locals have warned the male migrants would outnumber the 350 villagers by nearly four to one and increase the risk of crime.
🔮 Police are urgently investigating whether the incidents could be linked to wider organised crime but have not yet established whether they are all connected.
Also by Arthur Parashar
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 7 articles by Arthur Parashar →
Jon Brady
21 article(s) here · 1 carrying a prediction
🔮 Criminologists have warned that the show – which has produced three spin-offs – could be providing a 'how-to script' for copycat killers and would-be murderers.
🔮 The website for the poppy also features a video carrying the slogan 'from the river to the sea, Palestine will be free', which has been interpreted by Jewish organisations as a call for the destruction of Israel.
🔮 The 45-year-old, who had been a friend of Prince William at university, died without making a will, according to documents reviewed by the Daily Mail. The High Court granted letters of administration to his mother Monica Duncan, of Frome in Somerset, in July this year.
🔮 Lord Archer had been entertaining fans at the Leicester Square Theatre in central London on Sunday as he promoted what he had said would be his final book, Adam and Eve, alongside friend Gyles Brandreth.
🔮 I love England, I love Corby,' he said, adding: 'Everyone knows that Hamas is a terrorist organisation that would kill us if we didn't speak against the Jews while living there.
🔮 Boulares had threatened Mr Jones in Chiswick High Road, west London, the month before – telling him he would cut off his head after snatching his £17,000 Daytona Rolex watch.
🔮 Survivors of a train crash near Bedford that claimed the life of a driver are calling for a safety system to be installed that they say could have averted disaster - after Network Rail opted not to install it following a safety review.
🔮 It is evidently facilitating the advancement of ideas which, far from benefiting the public, could fuel discrimination, division and abuse.
🔮 A man believed to be Palestinian small-boat migrant Abu Wadee is seen leaving an asylum HMO in Corby earlier today - an ankle tag visible beneath his trousers Wadee - seen speaking on his doorstep earlier this week - says he no longer supports Hamas A man who identified himself as a housing officer was seen loading bags of possessions into the taxi before it left with Wadee inside Following his release from prison in December, Wadee was housed at the property alongside three other migrants under the Home Office's asylum dispersal scheme. He was traced to the house earlier this week, claiming he no longer supported Hamas, had Jewish friends and wanted to stay in the UK. The videos show Wadee at the Willow Place Shopping Centre in Corby, around a mile-and-a-half from the HMO.
Also by Jon Brady
Nothing else under this byline is closely related to this article, so these are simply their most recent.
All 21 articles by Jon Brady →

Topics

Airbnb British Canadian Cornwall Thorpe St Andrew School

Subjects

Dexter PERSON · 11× Dexter Morgan PERSON · 4× Benjamin Day PERSON · 2× British NORP · 2× Canadian NORP · 2× Day PERSON · 2× James Desborough PERSON · 2× Maria Saceanu PERSON · 2× Mark Twitchell PERSON · 2× Steven Miles PERSON · 2×

Narrative

Police on the scene of a stabbing at Thorpe St Andrew School in Norwich - where a teenager obsessed with serial killers including Dexter Morgan stabbed a girl in an unprovoked attack Benjamin Day was arrested wearing a Dexter-style outfit after murdering Maria Saceanu in a 'kill room' in a twisted 'tribute' to the show about a self-described ethical serial killer Dexter Morgan, played by Michael C. Hall, wearing a khaki shirt that Day changed into before killing his victim Canadian filmmaker Mark Twitchell and British teen Steven Miles were inspired to kill by Dexter Day's confession came just 70 days after James Desborough (pictured) was convicted of a Dexter-inspired double murder Dexter, which first aired 20 years ago, follows the life of Dexter Morgan, who by day works as a blood-splatter analyst for the police, and by night transforms into a vigilante serial killer who is expertly equipped to cover his tracks.
framing: assertive · carried by 1 article(s) · first seen 2026-10-23
🔮 Criminologists have warned that the show – which has produced three spin-offs – could be providing a 'how-to script' for copycat killers and would-be murderers.

Claims (92 extracted, 2 hedged)

For millions of ordinary fans, hit US crime drama Dexter has been the perfect binge-watch at the end of a long day. asserted
drama → hit → day
But for a twisted minority, it has ceased to be entertainment and mutated into something far darker: a twisted inspiration for real-world violence. Within just three months, two British killers who styled themselves on TV serial killer Dexter Morgan have been convicted of gruesome murders – while a 16-year-old obsessed with the show was convicted of attempting to murder a girl he did not even know in school. The boy, who cannot be named for legal reasons, was just 15 when he approached his female victim in a corridor at Thorpe St Andrew School while wearing a balaclava, plunging a knife into her back before fleeing the scene. His two-week-long trial heard he had a 'dangerous interest in killers and killing'; he created video compilations of both real and fictional serial killers, including Dexter, and craved what he saw as the 'admiration' they got for their crimes. asserted
they → cease → crimes
Just two weeks earlier, forensics student Benjamin Day, 20, admitted to murdering Maria Saceanu, 24, after luring her to a plastic-lined 'kill room' inside a West Midlands Airbnb, inspired by his obsession with the TV show. asserted
Day → admit → show
His confession came just weeks after another Dexter-inspired serial killer, James Desborough, 40, was convicted of murdering and dismembering two men in his remote woodland cabin in Cornwall. asserted
killer → come → Cornwall
Astonishingly, two other Brits, Steven Miles and Mark Howe, Canadian film-maker Mark Twitchell, American teenager Andrew Conley and Norwegian Havard Nyflot have all been convicted of killings inspired by Dexter since 2009. asserted
Brits → convict → 2009
Police on the scene of a stabbing at Thorpe St Andrew School in Norwich - where a teenager obsessed with serial killers including Dexter Morgan stabbed a girl in an unprovoked attack Benjamin Day was arrested wearing a Dexter-style outfit after murdering Maria Saceanu in a 'kill room' in a twisted 'tribute' to the show about a self-described ethical serial killer Dexter Morgan, played by Michael C. Hall, wearing a khaki shirt that Day changed into before killing his victim Canadian filmmaker Mark Twitchell and British teen Steven Miles were inspired to kill by Dexter Day's confession came just 70 days after James Desborough (pictured) was convicted of a Dexter-inspired double murder Dexter, which first aired 20 years ago, follows the life of Dexter Morgan, who by day works as a blood-splatter analyst for the police, and by night transforms into a vigilante serial killer who is expertly equipped to cover his tracks. asserted
who → obsess → tracks
Criminologists have warned that the show – which has produced three spin-offs – could be providing a 'how-to script' for copycat killers and would-be murderers. uncertain
which → warn → killers
Alex Iszatt, a behavioural criminologist, told the Daily Mail: 'Dexter gives them a ritual. asserted
Dexter → tell → ritual
They can fully become him: follow the same code and principles, wear the same clothes, and use the same methods of killing and disposing of bodies. asserted
They → become → bodies
'Dexter provides a usable identity. asserted
Dexter → provide → identity
They are ready to perform to an imagined audience. asserted
They → perform → audience
In the series, Dexter works as a blood-splatter analyst for the Miami Metro Police Department, but becomes a vigilante serial killer during the night. asserted
Dexter → work → night
His actions are strictly governed by a twisted quasi-ethical set of rules taught by his adoptive father, known as 'The Code'. asserted
actions → govern → Code
He can only kill proven murderers that have evaded justice – and he can never get caught. asserted
he → kill → justice
In the show, Morgan feels an uncontrollable, innate urge to kill – which he describes as his 'Dark Passenger' – and follows a meticulous routine, using his police network to research suspects beforehand. asserted
he → feel → suspects
His modus operandi is to prepare a 'kill room', wrapped completely in plastic sheets, to catch all evidence and blood. asserted
operandi → prepare → evidence
He tapes photos of the victim's crimes to the walls, forcing them to look at what they have done. asserted
they → tap → what
Finally, he murders them and dismembers their bodies before dumping them deep in the ocean. asserted
he → murder → ocean
'What makes Dexter particularly useful to a violent personality is that he provides a justification for killing,' Ms Iszatt adds. asserted
Iszatt → make → killing
'You're not a monster with uncontrollable urges; you're a vigilante, with standards, and the people you kill deserve it. asserted
you → kill → it
It doesn't matter if they happen to be your mother, brother or girlfriend. asserted
they → matter → ?
There's something inherently appealing about Dexter's dual identity; he is a dark version of the superhero fantasy, respectable and ordinary by day, secretly powerful and dangerous by night. asserted
he → be → night
For someone fascinated by control, violence and getting away with things, the fantasy is not simply being a killer, it's doing what everyone else can't, while remaining invisible.' asserted
everyone → fascinate → what
This week, the series was thrust back into the spotlight after a 16-year-old boy was convicted of attempted murder after stabbing a girl he did not know in the back with a kitchen knife in a horrifying unprovoked attack on March 11. asserted
he → thrust → March
He was arrested by armed police shortly after fleeing Thorpe St Andrew School, near Norwich. asserted
He → arrest → Norwich
His victim, who was also 15 at the time, miraculously escaped with only minor injuries to her back and was discharged from hospital the next day. asserted
who → escape → hospital
He was convicted of attempted murder after prosecutors successfully argued that he had intended to kill the girl – backed up by a cache of evidence police found at the boy's home that showcased an obsession with serial killers including Dexter. asserted
that → convict → Dexter
Dexter fanatic Mark Howe (pictured) was jailed for at least 21-and-a-half years for murdering his mother, Katrina Wardle, at their home in Leicester in 2014 Andrew Conley strangled his brother to death. asserted
Conley → picture → death
He too was obsessed with the US crime series Dexter Prosecutors said he was obsessed with serial killers and had written in a note to himself that he had 'seen serial killers being admired... asserted
killers → obsess → himself
I want admiration, gratification. asserted
I → want → admiration
I've wanted this for years. asserted
I → want → years
I don't care who I hurt. asserted
I → care → who
' King's Lynn Crown Court was shown video compilations the teenager had made at home of both real and fictional serial killers, including Dexter. asserted
teenager → show → Dexter
A video, thought to be made using the AI video editor Viggle.AI, showed the character dancing over a map of the show's setting, Florida, and a 'list of names of the victims'. asserted
character → think → victims
He made a similar video of actor Jamie Dornan as Paul Spector, a serial killer in the BBC2 series The Fall who, like Dexter, leads a double life: by day he is a bereavement counsellor but by night operates as a sadistic, sexually motivated murderer. asserted
he → make → murderer
The teen also produced a 'fancam edit' of Dornan in character – a slick compilation of clips usually made by fans of actors and pop stars to share with fellow admirers – which he captioned 'me btw (by the way).' asserted
he → produce → way
It featured Dornan removing a mask he fashioned out of a neck gaiter and a beanie hat – giving him an appearance not dissimilar to the balaclava the teenager wore on the day he attacked his victim. He also created a bizarre AI-generated video of US multiple killers Edmund Kemper and Ted Bundy dancing on top of a picture of the Earth alongside a third unidentified individual. asserted
killers → feature → individual
Other notes found by police expressed 'hatred for women' following the 'failure of a relationship', and hinted at a possible motive with thoughts on 'misanthropy, misogyny, suicide, bullying'. He is also said to have made a 'victims list', and wrote an essay on arming himself with a knife and stabbing a man to death in the street. Some of the material was found in a shoebox that appeared to have been stabbed. asserted
that → find → shoebox
In his opening speech, prosecutor Christopher Paxton KC said the boy had an 'obsessive and dangerous interest in killers and killing' and a 'hatred for women'. asserted
boy → open → women
He added: '[He] went to school not to learn but to kill, taking with him a kitchen knife.' asserted
He → add → knife
…and 52 more, not listed.
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