On the evening of 14 May 1977, Nairac left the army base in Bessbrook at 9.25 pm and was due back by 11.30 pm. He drove alone to The Three Steps pub in
Dromintee, a village in South Armagh, on an undercover operation potentially to meet an
informer. The idea of being with an informant in a pub was discounted by an RUC Special Branch officer who claimed, instead, that the undercover soldier had gone to the Four Steps to meet a girl who had a close relative in the IRA. Nairac's final communication with base confirmed his arrival at the pub just before 10 pm. Witnesses say that Nairac got up and sang a republican folk song, "
The Broad Black Brimmer", with the band who were playing that night. Some time after 11 pm, Nairac was walked out of the pub by several men and challenged to a fight by one of them, Terry McCormick; the latter heard a metallic sound when Nairac was punched and fell to the ground; believing the man had a gun, McCormick called out to his companions to help overpower him. After a ferocious struggle he was driven across
Irish border to a field in the
Ravensdale Woods in the north of
County Louth, where an IRA member joined the abduction group. Following a violent interrogation, during which Nairac was allegedly punched, kicked,
pistol-whipped and hit with a wooden post, he was shot dead. He did not admit to his true identity. McCormick, one of Nairac's abductors, posed as a priest in order to try to elicit information by way of Nairac's
confession. Nairac's last words according to McCormick were: "Bless me, Father, for I have sinned." Nairac's disappearance sparked a large-scale search throughout Ireland. The hunt in Northern Ireland was led by
Major H. Jones, Brigade Major at HQ
3rd Infantry Brigade. Nairac and Jones had become friends, and Nairac would sometimes eat supper at the Jones household. After a four-day search, the
Garda Síochána confirmed to the RUC that they had reliable evidence of Nairac's killing. The stated view that Nairac's body was disposed of by being put through a
meat grinder have been dismissed as a myth. For example, an edition of the
BBC's
Spotlight, broadcast on 19 June 2007, asserted that the body was not destroyed in a meat grinder, as alleged by an unnamed IRA source. McCormick, who was on the run in the United States for thirty years because of his involvement in the killing (including being the first to attack Nairac at the pub), was reportedly told by a senior IRA commander that he was first buried on farmland and then reburied elsewhere. The location of Nairac's body remains unknown. Nairac is one of three IRA victims whose graves have not been revealed and who are among those known as
'The Disappeared'. The cases are under review by the
Independent Commission for the Location of Victims' Remains (ICLVR). A former IRA man, identified as Martin McAllister, states that the search for Nairac's body has been hindered by two key realities: first, the people involved in his "summary execution" were not in the IRA and, therefore, not subject to pressure from that organisation; second, a number of them have moved to different areas since the killing. In the spring of 2025, an IRA source was quoted as saying that Nairac's body would never be located. In May 2000, statements were made that Nairac had married and fathered a child with a woman named Nel Lister, also known as Oonagh Flynn or Oonagh Lister. In 2001, Lister's son sought
DNA testing, which confirmed the allegations to be untrue. ==Criminal prosecutions==