The husband of a Bible John victim has urged police to release a photo-fit of the only other witness who could unmask the serial killer.

Bible John raped and killed George Puttock’s wife, Helen, in Scotstoun, in 1969.

A man identified as “Castlemilk John” is believed to be a witness in the serial killer’s murders.

Now, Mr Puttock has issued the plea, after revealing he is battling health problems, fearing he will never find out who murdered his wife, The Daily Record reports

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He said: “Why they have never released an image of this man who was said to have been a friend of Bible John is beyond me.

“I don’t understand why they never did an artist’s impression of him. It’s not too late, they could still do it even today.”

Glasgow Times: An artist's impression of Bible JohnAn artist's impression of Bible John

Helen was the third victim of Bible John. 

The three women met two men, both called John. 

One said he was a slater from Castlemilk and left the sisters to share a taxi with the suspected killer.

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Professor David Wilson, who has written a book about Bible John, said of “Castlemilk John”: “Why was no sketch produced about him – he seemed to vanish from the investigation and from history.”