A man's been arrested in connection with the murder of Marian Beattie in the North in 1973.
The body of the 18-year-old was found at the bottom of a quarry near Aughnacloy in Co Tyrone, close to the Co Monaghan border in March of that year.
It was just hours after she attended a charity dance nearby.
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The PSNI arrested a man in his 70s this morning, who remains in custody.
