McCaughey claimed that the Kingsmill massacre of 10 Protestant civilians the following day caused him to pass RUC intelligence to loyalist paramilitaries . He was one of the first police officers on the scene and recalled that Weir and McCaughey implicated colleagues in at least eleven other sectarian murders . McCaughey claimed that many local RUC and Ulster Defence Regiment ( UDR ) personnel were working with loyalist paramilitaries in the Armagh area in what became known as the Glenanne gang . The Barron Enquiry into the Dublin and Monaghan bombings of 1974 found a chain of ballistic history linking weapons and killings , to which McCaughey admitted involvement . These included , " in 1975 , three murders at Donnelly 's bar in Silverbridge , the murders of two men at a fake UDR checkpoint , the murder of IRA man John Francis Green in the Republic , the murders of members of the Miami showband and the murder of Dorothy Trainor in Portadown . In 1976 , they included the murders of three members of the Reavey family , and the attack on the Rock Bar in Tassagh . " In addition Barron found that it was probable the guns were kept at a farm at Glenanne belonging to James Mitchell , an RUC reservist ... from which a group of paramilitaries and members of the security forces ... carried out the massacres at Dublin and Monaghan ... . The chain was unbroken because the perpetrators of these attacks were n't caught , or investigations were haphazard , or charges were dropped , or light or suspended sentences were given . The same individuals turn up again and again , but the links were n't noted . Some of the perpetrators were n't prosecuted despite evidence against them . Weir claimed that McCaughey was part of this " Glenanne gang " , although McCaughey disputed this . McCaughey refused to give evidence to Judge Barron 's enquiry , claiming " I know nothing about it " . Judge Barron disagreed . " The Inquiry agrees with the view of An Garda Siochana that Weir 's allegations regarding the Dublin and Monaghan bombings must be treated with the utmost seriousness . " In prison in the Maze , McCaughey completed a degree in Education and Social Science in 1994 from the Open University . He also claimed that he was " a devout member of Ian Paisley 's Free Presbyterian Church . " McCaughey had had a long association with Paisley , founder and leader of the Free Presbyterian Church , and of the Democratic Unionist Party ( DUP ) , which McCaughey had originally joined in the 1960s
Kingsmill massacre
Kingsmill massacre
Billy McCaughey