Getty ImagesThe gang’s principle base was a farm in the County Armagh village of Glenanne, which belonged to a Royal Ulster Constabulary (RUC) officer, James Mitchell, who is now deceased.
It has been alleged the gang’s members included other police officers, as well as soldiers in the Ulster Defence Regiment (UDR).
The gang is suspected of carrying out around 90 attacks in the 1970s.
They include the 1975 Miami Showband massacre, when three musicians were shot dead.
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