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5's chilling new 2-parter with Nicola Walker is a must-watch for true crime fans


The Split actress narrates the documentary series, Forensics: Murder Case


woman in black blazer sitting on sofa in tv studio© Ken McKay/ITV/Shutterstock
Nicky Morris
Nicky MorrisActing TV and Film Editor
July 18, 2025
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A new true crime documentary is just days away from its release on 5 – and it sounds chilling. 

The Split star Nicola Walker narrates the series, titled Forensics: Murder Case, which delves into the brutal, unsolved murder of George Murdoch four decades later, while journalist Kirsty Wark presents the two-parter. 

There's no shortage of true-crime documentaries on 5, but Forensics: Murder Case might just stand out from the rest. The series is a detailed exploration of a murder case that has haunted detectives since the 1980s and promises a rare glimpse into the inner workings of a cold case investigation.

Keep reading for all you need to know about the documentary.

What to expect from Forensics: Murder Case

The two-part documentary looks into the 1983 murder of Aberdeen taxi driver George Murdoch, 58, whose body was found beside his vehicle, with a cheese wire garrotte lying nearby.

man walking down street© Channel 5
Mhorvan Sherret, a former detective who worked on the original 1983 inquiry, appears in the documentary

For 40 years, the case has remained unsolved, leaving George's family without answers and a community wondering if his killer still walks among them.

The documentary film explores the details of the crime and the significant advancements in forensics that have led to a major DNA breakthrough that could now solve the case, according to the synopsis. 

It continues: "The police investigation has never closed but the murderer's identity has remained a mystery since 1983, the killer quite literally disappearing into the night. Now, over forty years later, there is a glimmer of hope – a DNA profile from preserved crime scene evidence that police believe belongs to George's killer."

man in blue shirt sitting in dimly lit office© Channel 5
Detective Inspector James Callander is the Senior Investigating Officer on the murder inquiry

"Detectives from the eighties onwards have been haunted by this case; George Murdoch’s killer is the one that got away. The police of the past, however, were hampered by the lack of CCTV and mobile phone evidence – resources indispensable to a modern-day inquiry. Despite conducting 10,000 house-to-house inquiries and recording 7,000 statements, the killer has remained beyond their grasp.

But now the net is closing, and the public has a vital role to play. The killer's DNA hasn't matched to a profile on the national database, but detectives have the next best thing – a list of possible blood relatives that could lead them to the door of a murderer."

A 1983 e-fit of man with dark curly hair© Channel 5
The series comes to 5 on Monday, 21 July

In the second instalment, a breakthrough provides the police with a DNA profile believed to come from George Murdoch's killer, prompting detectives to track down people across the UK who could be blood relatives. 

When will Forensics: Murder Case be released?

Episode one arrives on 5 on Monday, 21 July at 9pm. Episode two airs the following evening.

woman in white forensic coat examining blazer© Channel 5
The series delves into the death of Aberdeen taxi driver George Murdoch

Other true crime documentaries on 5

5 offers a range of true crime documentaries, including The Mushroom Murders, which delves into how an Australian woman, Erin Patterson, murdered three guests at a family dinner. 

Elsewhere, Lucy Letby: Did She Really Do It? unpacks the evidence used to convict neonatal nurse Lucy Letby, while Killed by Our Daughter: The McCullough Murders delves into the chilling case of Virginia McCullough, who was jailed for life for murdering her parents and lived with their corpses in their Essex home for four years. 

WATCH: The moment Lucy Letby was arrested for multiple murders and attempted murders
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