The film also claims that one of the killers was an informer,"Ulster pub massacre families sue amid claims killer was informer" . The Sunday Times. 12 November 2017. and an ex-police officer told the film-makers that Special Branch may have had foreknowledge of the attack. According to the officer, Special Branch told him there was an arrest operation ready to catch the UVF unit, after receiving intelligence from an informer. The informer told Special Branch hours before the attack that it had been called off because of problems with the getaway car. The arrest operation was cancelled, but the attack went ahead."Loughinisland documentary suggests Special Branch had prior knowledge of massacre" . The Irish News. 2 November 2017.
