Bus driver Alexander Gartshore admitted the murder to his father Sanny, according to Gartshore’s cousin Jim Clark.
Jim has told how Sanny kept the secret and took it to his grave to protect his wife Jenny from the heartache of having a son revealed as a child killer.
The revelation has emerged in the week that saw the 64th anniversary of Moira’s disappearance.
She vanished in Coatbridge on February 23, 1957, weeks before she turned 12.
Moira was the last passenger on a bus driven by convicted child rapist Gartshore, then 36, on a freezing day in blizzard conditions.
Gartshore died, aged 85, in a Leeds hospital in April 2006 never having been charged in relation to Moira but the Crown Office has since said he should have been prosecuted for her murder.
Jim, 73, from Glasgow, told the Record: “It must be nearly 50 years since my own father told me, in confidence, that his brother-in-law, Sanny Gartshore, had told him his son was responsible for Moira.
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