This week, a documentary was aired on the BBC after a new photofit was released of what a certain serial killer may look like today.
Bible John, as he goes by, was featured in the two-part documentary which aired its first episode on Tuesday night (January 4) and tells the story of three women - all of whom were murdered.
With the new photo now having been made public, there is a new interest in the case and finding the murderer.
But who is Bible John and what did he do?
Bible John is a serial killer who is believed to have killed three young women in Glasgow over 50 years ago between 1968 and 1969.
The three women are called Helen Puttock, Jemima McDonald and Patricia Docker and according to the BBC, this is the "largest murder hunt Scotland has ever seen."
The reason behind his name is because the killer repeatedly quoted from the Bible and ranted about adultery before he committed the heinous acts.
To this day, he has never been caught and his identity remains a mystery.
But now thanks to a BBC documentary which fired aired back in November, their deaths have sparked further interest following which examined the hunt for their killer.
What happened to Helen Puttock, Jemima McDonald and Patricia Docker?
According to the BBC, all three women had been to the Barrowland Ballroom (also known as Barrowlands) and were killed in a "similar brutal and sadistic fashion."
Patricia, who was 25-years-old and worked as a nurse in Glasgow. She attended an event at the iconic venue in Febuary 1968 but the next morning, she was sadly found strangled.
Over a year later in August 1969, Jemima, 32, was found strangled, raped and beaten to death in an old tenement building.
Three months later, 29-year-old Helen was found murdered after getting into a taxi with the suspect and her sister, who was dropped off at home.
What is 'The Hunt for Bible John' episode one about?
According to the BBC, the two-part docuseries covers an 18-moth period where "three women were found murdered in Glasgow. They had all been to the same iconic dancehall and were killed in a similar brutal and sadistic fashion.
"The suspect’s now infamous moniker came after a key witness described a man who picked up women, yet quoted extensively from the Old Testament and frowned on adultery.
"Despite one of the biggest manhunts in Scottish history, more than 50 years on, these brutal killings remain unsolved.
"With insight from criminologists and forensic psychologists, the series reflects on the 1960s' societal attitudes on marriage, dating and women’s sexual autonomy, and how these attitudes informed the public perception of the three murder victims - Patricia Docker, Jemima MacDonald and Helen Puttock.
"Filmed by Bafta Award-winning Murder Case director Matt Pinder, with testimony from Barrowland dancehall attendees, journalists who reported on the case and the detectives who worked around the clock to try to catch the killer, The Hunt For Bible John delves into the dark legacy this elusive serial killer left on a city."
What is 'The Hunt for Bible John' episode two about?
Adding to their website the BBC explained: "The second episode of The Hunt For Bible John begins in November 1969 after the discovery of third victim, Helen Puttock, with the police now fearing they’re searching for a serial killer.
"The testimony of Jeannie Williams, Helen’s sister, proved instrumental in building a picture of the suspect. She told journalist Magnus Linklater, and later police detectives, that her sister left the Barrowland taxi with a man called John, whom they’d met earlier that night.
"Jeannie’s description of a mysterious red-haired, smart-suited man who had crooked teeth and quoted from the bible, would become the basis of the biggest manhunt Scotland had ever seen.
"With none of the modern investigative tools like CCTV and DNA fingerprinting at their disposal, 1960s detectives took the unusual step of commissioning a life-like drawing of the suspect, based on Jeannie’s description.
"Released to the public through the press, the portrait led to hundreds of Glaswegian men being questioned. Barbers, dentists and tailors were all shown the image of ‘Bible John’ in the hope that they might recognise him.
"However, despite 50,000 statements being taken and over 300 identity parades, detectives were no closer to solving the murders."
