Although Weir 's later affidavit confirmed he had already indirectly participated in UVF and Glenanne gang operations , and had visited Mitchell 's farm , according to journalist Liam Clarke , Weir officially became part of the Glenanne gang on 23 June 1976 . He was recruited by SPG colleagues at an RUC sporting event he had attended in East Belfast when he was stationed at Castlereagh RUC station . Weir had been deeply affected by the Kingsmill massacre five months earlier , when 10 Protestant workmen had been ordered out of their minibus and gunned down by a republican group , the South Armagh Republican Action Force ( SARAF ) . It was this attack that had provoked him into becoming a full-fledged member of the group , as Weir and the SPG believed the SARAF was a cover name for the IRA and would carry out more attacks against Protestant civilians
Kingsmill massacre
Kingsmill massacre
John Weir (loyalist)