The IRA disbanded the unit which carried out the attack in reaction to public revulsion at the killing of Johnston and the killing of Harry Keys . The Gardaí linked a man in his mid-20s , a key member of the Ballyshannon ASU , to the murders of Keys , Johnston , and of William Hassard and Frederick Love . There was unconfirmed speculation that this unit was also responsible for the Remembrance Day bombing in Enniskillen in November 1987 . Johnston was described by her employer as :
Remembrance Day bombing
Remembrance Day bombing
Murder of Gillian Johnston