THE killer of Stephen Barnes, John Wilson, has died behind bars at HMP Low Moss. 

Wilson murdered Stephen, 23, at a bus stop in Shettleston after a fight involving another man erupted in a nearby pub. 

After the brutal killing, cops raided Wilson's Mount Vernon home and found a stash of weapons and ammunition. 

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He was caged in 1991 for his crime and his family have previously told of their horror when he said "bang bang" to them as he was jailed. 

The Scottish Prisons Service confirmed today that he died in the East Dunbartonshire prison on February 15. 

Five years ago, he fumbled an attempted escape, meaning the prospect of release was far off for the killer. 

He had failed to return from an unescorted work placement in Dalmarnock and was later found in a Rutherglen boozer. 

A spokeswoman for the prison service said: "Police Scotland have been advised and the matter reported to the Procurator Fiscal.

“A Fatal Accident Inquiry will be held in due course.”