While stationed at Newry , Weir visited Jackson 's home outside Lurgan , where they discussed potential attacks against the IRA , at least four times . He began to supply the Mid-Ulster UVF with weapons he procured from a loyalist group in County Down called the " Down Orange Welfare " which comprised both former and serving members of the security forces , including Chief Inspector Harry Breen . These weapons were stored at Mitchell 's farmhouse . Breen ( who later held the rank of Chief Superintendent ) and Superintendent Robert Buchanan were both shot dead on 20 March 1989 after being ambushed outside Jonesborough , County Armagh by the Provisional IRA South Armagh Brigade . The two RUC officers were travelling in an unmarked car after attending a cross-border security conference in Dundalk with senior Garda officers
ambushed outside Jonesborough
1989 Jonesborough ambush
John Weir (loyalist)