A man dubbed 'Bible John' who murdered three women in the 1960s could be alive and living in Spain, it has been claimed.
Award-winning author Dolores Redondo made the bombshell claim while promoting her novel, "Waiting For The Flood".
The book sees Scottish detective Noah Scott Sherrington pursue Bible John to Bilbao on a hunch the serial killer fled there to escape Glasgow cops.
The killer, who has been identified, was feared to be at large in Scotland throughout the decades.
He is believed to have murdered three young women, Patricia Docker, 25, Jemima MacDonald, 32, and Helen Puttock, 29, over a period of 18 months between 1968 and 1969 in Glasgow.
The murders took place after he met the women at the Barrowland Ballroom in the city's east end.
Speaking about the novel to El Espa ol, Ms Redondo said she believed that Bible John could be alive and well today and living as a "respectable old man" in the Spanish port.
Ms Redondo said: "As far as we know this character may still be alive.
"It would be something similar to the case of Jack the Ripper, although we can be assured that he is dead because a long time has passed.
"Uncaught killers become legends..
"There's always a story around them that they were very smart, smart enough to be able to run from the police, but I think other factors can play a part as well.
"Today he could be a respectable old man of those who walks through Bilbao or Glasgow".
The author's novel is set between Glasgow and Bilbao in the days prior to a huge flood that devastated the Basque Country in 1983 and killed 34 people.
In a separate interview with Radio Intereconomia Valencia, the author elaborated on Bible John and her belief that he may have escaped overseas to Bilbao or another "large port where in the 80s all kinds of materials were exported from Scotland".
She said: "It is a crime novel that is based on a policeman chasing a murderer, a novel which required very intense documentation work because everything except the policeman is real.
"Bible John was the most wanted man in Scotland after killing three women, a real murderer that I have had to investigate.
"Experts say that these murderers do not stop killing until they are in jail, dead or have moved to another country.
"He could be in Bilbao or in any of the large ports where in the eighties all kinds of materials were exported from Scotland.
"A city that is super polluted, dirty and with a lot of noise.
"It is an absolutely feasible option since there were many British people who lived in the city, in fact, Scottish companies have continued to operate in the port since that time."
She found experts in both psychology and psychiatry to help create a profile of Bible John for her novel, adding that she "made it clear how I should approach the character I was facing, a victim of childhood abuse".
At the time of the murders, there was speculation that Bible John may have fled Glasgow, which prompted investigators to circulate copies of a composite drawing of Bible John.
It was the first time the Crown Office authorised a composite sketch of a suspect at British Army, Navy and Air Force bases across the globe.
In the past year, the murders were explored in the acclaimed BBC documentary series The Hunt for Bible John and a ten-part podcast series titled Bible John: Creation of a Serial Killer, which delved further into the victims' lives.
