20 Convicted Murderers Who Deny Their Crimes

20 Convicted Murderers Who Deny Their Crimes

Welcome to WatchMojoUK, and in this unranked list we’re looking at killers convicted in Britain who’ve never admitted to the crimes they were sent down for.

David Mulcahy

Alongside John Duffy, this pair became known as the infamous railway killers. Duffy was apprehended in 1986 for crimes they began committing 4 years earlier. All their victims were women at train stations around London. Duffy was eventually arrested after stalking a lady in a park, then confessed to his crimes, including stating he had a partner. It wasn’t until 1999 that they arrested Mulcahy, after new DNA evidence linked him to the crimes. He was convicted on three counts of murder, but still insists he’s innocent despite the evidence, alongside Duffy admitting he was with him on multiple occasions.

Hawley Harvey Crippen

In 1910, Dr Hawley Crippen made history, becoming the first crook police used wireless telegraphy to catch. One evening, his wife Cora vanished after a party. Her husband alleged she’d returned home to California, where she’d then died and been cremated. Police got suspicious, so they interrogated him, and he said she’d truly run away with another lover. Crippen then suspiciously tried fleeing to Canada, prompting police to hunt through his home, where they found what they believed to be Cora’s remains hidden below his cellar. They caught him on the boat, tried him, and sentenced him to death, but he proclaimed his innocence the entire time. Over a century later, people are still debating his guilt, with no clear-cut answer.

Ian Simms

Helen McCourt was only 22 years old when she vanished from her village in Merseyside. We still have no idea where her body ended up. Ian Simms was a nearby publican who aroused suspicion, as a scream was heard from his pub around the time she vanished. Detectives discovered a wealth of incriminating evidence during their investigation. For instance, they found McCourt’s earrings, neck scratches, and her blood across his car and flat, among other things. This led to him being convicted of the killing, despite them never finding her body. Simms finished his sentence in 2020, then died 2 years later, still refusing to reveal her remains’ location, as he denies ever killing her.

Gordon Park

You may better recognise Park as the alleged murderer during the Lady in the Lake trial. His wife Carol vanished without a trace in 1976. Over two decades later, in 1997, divers found her remains in Coniston Water, the Lake District. When authorities arrested him, his first response was apparently “oh dear.” They didn’t properly charge him until 2004, when they gave him a life sentence for the misdeed. Park and his family all insisted he wasn’t responsible, so began the challenge of getting his conviction overturned. In 2010, Park decided to take his own life on his 66th birthday. They’ve tried to clear his name posthumously, but with no success.

David Morris

In Swansea, 1999, a family fell victim to a despicable slaughter, resulting in the deaths of four individuals from three generations. They were called the Clydach murders, and David Morris was convicted of the gruesome deed in 2006, with a minimum sentence of 32 years. That was the second time he’d been tried, with a unanimous verdict sending him to the slammer. Morris has always insisted he’s innocent, resulting in numerous failed attempts to overturn his conviction. New evidence has since come out, and South Wales Police claim it only implicates Morris further. The criminal died in prison aged 59, never succeeding in clearing his name.

Walter Graham Rowland

In 1934, this individual was given the death sentence for killing his infant daughter. They eventually reduced it to life imprisonment, but they later released him so he could fight in World War 2. When peace returned, the murdered remains of Olive Balchin were found in a bomb site up north. Rowland was given the death penalty, but before it was carried out, another prisoner, David Ware, admitted to doing it. Ware then almost instantly retracted it and alleged he was hoping he’d look “swank” for confessing. Evidence pointed to Rowland, though, and he was hanged shortly after. Ware ended up trying to kill someone in 1951, making people retroactively wonder whether Rowland was truly innocent, but we may never know.

Michael Steele & Jack Whomes

The Rettendon murders happened in Essex in 1995. The victims were three supposed dealers found full of bullets on a farm. Operation Century was launched to figure out who did it, which failed entirely. Authorities later convicted two individuals for the murders, Jack Whomes and Michael Steele. Both denied any involvement, but that wasn’t a strong enough defence, leading them to spend decades behind bars. Now, both are free men, and in their old age they still consider themselves completely innocent. Currently, their convictions are being checked once again, but the CCRC believes they’re unlikely to change their stance.

Ray Gilbert

At a betting shop in Liverpool in 1981, manager John Suffield was fatally attacked when opening up. It was allegedly a robbery gone wrong, and authorities believe it was perpetrated by Ray Gilbert. They handled the case pretty questionably, interrogating him for 48 hours without a solicitor. It yielded a confession Suffield claimed was made under duress, then later retracted. No physical evidence places him at the crime scene, but he stated local thugs pressured him to plead guilty. This got him and his accomplice a life sentence, except the accomplice was acquitted in 2000. Gilbert stayed in prison for 36 years total, and after getting released in 2016, he still insists he was innocent and is working hard to prove it.

Jason Moore

In 2005, Robert Darby was found fatally stabbed in a car park in London, in the middle of the day. 8 years later, the courts gave his supposed close friend Jason Moore a life sentence for the crime. Moore and his family have never admitted to any wrongdoing. Evidence that could prove it came to light in the 2020s, and in 2025 the CCRC decided to review it once again. This was mainly because one of the primary witnesses went back on their statement, stating they were inebriated at the time. Except for their words, there was no concrete evidence implicating Moore in the murder.

Mark Alexander

While studying law, Alexander is believed to have taken his father’s life, then hid his remains in the family garden. Alexander was only 22 years old when he was given a life sentence, with a minimum term of 16 years. The entire time, he’s denied any wrongdoing. There’s also no direct evidence to support him being guilty. Supposedly, his father led a pretty suspicious life, going by countless aliases and even making a few enemies. There’s strong evidence he was involved in fraud and a variety of other crimes, making people question Mark’s conviction. Mark’s been a model prisoner, though, earning two law degrees and getting moved to an open prison for his behaviour.

Benjamin Geen

In the 2000s, Geen was a trainee nurse with a reputation for thrill-seeking. This earned him the nickname “Ben Allitt,” a reference to Beverley Allitt, a serial-killing nurse. 18 patients suspiciously died while under Geen’s sole supervision. None of them had life-threatening ailments, but somehow had respiratory arrests when Geen came along. The pattern was later noticed, and Geen was arrested in 2004. They found him carrying a worn-out syringe full of a paralysing agent, which he questionably emptied into his pocket after seeing officers. With overwhelming evidence against him, he got 17 life sentences in total. Despite this, he’s always denied any wrongdoing, leading him to appeal his sentence numerous times, failing every attempt.

Colin Norris

Originally from Glasgow, this serial killer was active in Leeds in 2002. He was also a nurse believed to have killed patients by injecting them with lethal substances. His weapon of choice was insulin, which, according to his ex-partner, he tested by killing their cat. Norris had between 4 and 10 victims total, all during the same year. He was apprehended after people spotted the pattern of his patients dying, getting him imprisoned for life. Norris was unusually aggressive throughout the entire investigation, from police interviews to the trial. Despite this, he’s determined to prove his innocence, leading to multiple failed appeals.

Kevin Nunn

In 2005, Dawn Walker’s charred remains were discovered in Bury St Edmunds. The blame quickly fell upon her boyfriend, Kevin Nunn, who stated he wasn’t involved at all. That didn’t stop him from being given life with a minimum sentence of 22 years for the murder. Primary evidence was the fact that they’d argued the night before Walker vanished. Additionally, her friends claimed she had ended the relationship due to Nunn’s jealous and controlling tendencies. Nunn denies it and is eager to see fluids from the crime scene re-examined with modern technology. This appeal was rejected in 2014, so he’s still in the slammer today.

Omar Benguit

Jong-Ok Shin was originally from South Korea, but relocated to Bournemouth to study. There, she was tragically stabbed to death in 2002. They decided Omar Benguit was responsible on account of a local’s statement in a police interview. It took three trials, but they eventually convicted Benguit in 2005. It’s since become one of the most contentious convictions in the UK, with three separate documentaries questioning its legitimacy. Reviews in the 2010s upheld his conviction, but he’s always maintained his innocence and believes he was set up by police. This latter statement has recently been confirmed by 13 witnesses stating authorities pressured them. Things are still ongoing, so there’s a chance Benguit could be freed if he was truly innocent.

Lucy Letby

Our next entry is yet another nurse, but this one horrifically targeted babies in 2015 and 16. The hospital she worked in noticed an unusually high number of infant fatalities when nurse Letby was on duty. This led to her being removed from the hospital in 2016, then police became involved the following year. Letby was finally arrested in 2018, then five years later was found guilty of seven counts of murder. She got a life sentence with no chance of ever being released. Despite all this, she still denies any wrongdoing, claiming it was the system that failed her.

Glyn Razzell

Earlier in the video, we discussed the case of Helen McCourt and her missing remains. This led to Helen’s Law, which makes it impossible for a convicted killer to get parole without revealing the body. This stopped Glyn Razzell from getting parole, as he’s never revealed where his wife is buried. In 2003, he was found guilty of murdering his wife Linda a year after she mysteriously vanished. Razzell claims much of the evidence contradicted itself, leading to him being wrongfully convicted. People believe he was guilty and is simply refusing to reveal the body, as it would ruin his defence. Glyn argues the opposite, but until Linda’s remains are found, we may never truly know.

Michael Stone

The Russell killings happened in Kent in 1996. Lin Russell was walking home with her daughters Josie and Megan. They were brutally attacked, which proved fatal for Lin and Megan. There was a lack of physical evidence showing Michael Stone was the likely culprit, but plenty of testimonies from friends and witnesses. For instance, they claimed his clothes were covered in blood the day after the killings. All these clothes were suspiciously burned before police could investigate them, though. Years later, he still claims he was set up, but an appeal is currently ongoing which may reveal Levi Bellfield was responsible, as he apparently confessed to the murders on more than one occasion.

John Cooper

The Pembrokeshire murders took place in Wales in the 80s. It was two separate instances of double murders, which they believed were caused by John Cooper. Evidence against him included comparing his appearance on “Bullseye” to a sketch of the suspected killer. It took decades for them to convict him, though. The case was cold until 2009, when new DNA evidence led to him getting four life sentences in 2011, with a whole life order. Cooper is pretty insistent on his innocence, but his poor criminal record makes it questionable. He’s also been diagnosed as a psychopath, meaning we should all take his words with a massive grain of salt.

Luke Mitchell

High schooler Jodi Jones was found dead in the woods of Dalkeith in 2003. After people realised she was missing, a search party was organised, and her boyfriend Luke Mitchell apparently instantly found her body. The coat he’d been wearing the last time he was with her, plus the knife he always carried, had suspiciously vanished. His mum replaced them, then said the originals never existed. These were crucial pieces of evidence for finding Luke Mitchell guilty of murder, getting him life behind bars. Mitchell insists he’s innocent, and has developed a major online following who defends him. Unfortunately, this has led to a lot of cruelty towards Jones’ family, which isn’t justified at all, regardless of who you think did it.

Jeremy Bamber

The White House Farm murders were a horrific scene. 5 members of the Bamber family died, including two children, and they later convicted Jeremy Bamber of the crimes. The primary evidence was the fact that Jeremy lied about a call his father made, claiming their sister Sheila had started firing at them with a gun. Bamber always denies responsibility, though, and there’s even new evidence emerging in 2026 that may support his claims. For instance, they thought a silencer was used, which implicated Bamber, but recent forensics show no evidence for one being present. Now, he’s been locked away for 40 years, an exceedingly long period, especially if it turns out he was innocent all along.

Do you think any of these individuals were wrongfully convicted, or do you agree with their guilty verdicts? Let us know in the comments below!