Travers had described the English-accented man as having been of normal height and thought he had fair hair, but was not certain. Travers was not able to positively identify Nairac, from his photograph, as having been the man at Buskhill. The RTÉ programme "Today Tonight" aired a documentary in 1987 in which it claimed that former UVF associates of Harris Boyle revealed to the programme's researchers that Nairac had deliberately detonated the bomb to eliminate Boyle, with whom he had carried out the Green killing. Journalist Emily O'Reilly noted in the "Sunday Tribune" that none of the three men convicted of the massacre ever implicated Nairac in the attack or accused him of causing Boyle's death. Retired diplomat Alistair Kerr wrote a biography of Nairac entitled "Betrayal: the Murder of Robert Nairac" published in 2015, which offers documentary evidence that clears Nairac of having been at Buskhill overseeing the attack. According to Kerr, on 31 July 1975 at 4 am Nairac had started out on a road journey from London to Scotland for a fishing holiday. He also provides other alibis for Nairac precluding his presence at the scenes of both the John Francis Green killing and the Dublin and Monaghan bombings. However, Ministry of Defence documents released in 2020 contain suggestions that Nairac acquired equipment and uniforms for the Miami Showband killers, and that he was responsible for the planning and execution of the attack itself.