Two people who beat a man to death before throwing his body over some of the highest cliffs in Ireland, at Sliabh Liag in Donegal, have argued that their murder convictions should be overturned.Alan Vial (41) and Nikita Burns (25) were convicted last year following a trial at the Central Criminal Court of the murder of 66-year-old Robert Wilkin, known as Robin. The trial heard the three had been drinking together on June 25th, 2023, in various places around Donegal, before a row broke out as Vial drove them along a country road towards where they were living in Killybegs.Wilkin suffered two blows to the back of the head with a rock that either killed him or knocked him unconscious. Vial and Burns then drove him to the top of the cliffs and threw his body over the edge. Gardaí became suspicious when Vial and Burns later crashed the car which, despite their efforts to clean it, had blood stains all over the roof. They arrested Vial for drunk-driving and seized the car. Burns, meanwhile, went to a friend’s house, where she told several people that she and Vial had “battered” a man with a rock and thrown him over the cliffs.Chris Quinn told the trial that Burns arrived at his door late that night looking “panicky and deranged”, and he thought she was “off her head”. He recalled her saying she had murdered a man and that she had “battered the fella until his face was out the back of his head”.Burns later spoke on the phone to Sharon O’Dowd, who recorded the conversation. The recording revealed Burns saying that they had “beat some man’s head in” and that Vial had dragged him out of the car and “started caving his head in”.Shane Costelloe, for Vial, on Thursday told the three-judge Court of Appeal that his client was prejudiced in the eyes of the jury when they heard the various admissions that Burns made during that time. He said the pair should have been tried separately so that the jury would not have heard her blaming Vial for the fatal blows.Costelloe accepted that the trial judge, Paul McDermott, had been careful to warn the jury that they were not allowed to use the statements of one accused as evidence against the other. However, counsel said in this case the jury would have been “overwhelmed” by the “sheer emotional negativity” of the prejudicial material put before them.Costelloe said his client accepted he was present when Wilkin was killed and that he helped to put him over the cliffs. However, he said Vial denied striking Wilkin and there was no independent evidence beyond the statements of his co-accused that he was responsible.Eoin Lawlor, for Burns, said the statements made by his client incriminating herself were not voluntary and should not have been heard by the jury. She was, he said, intoxicated at the time and there was a question over whether she was in her rational mind.Bernard Condon, for the Director of Public Prosecutions, said that for Vial’s appeal to be successful, he would have to show that the refusal to hold separate trials had amounted to a miscarriage of justice. There was, he said, ample evidence to prove Vial’s guilt regardless of anything his co-accused said. In relation to Burns, counsel said statements made by accused people to other private citizens are always relevant and admissible. The law, he said, allows for involuntary statements to be ruled inadmissible to protect people from the power of the State. No such protection exists for people engaged in conversations in the private sphere, he said.Burns, of Carrick, Co Donegal and Vial of Drumanoo Head, Killybegs, were present in court for today’s hearing. Judge Patrick McCarthy, sitting with Judge Tara Burns and Judge Charles Meenan, reserved judgment.