Alan Cawley admits killing John and Tom Blaine
The Central Criminal Court has heard two elderly brothers died as a result of a violent struggle in their home in Castlebar, Co Mayo four years ago.
Alan Cawley from Four Winds, Corrimbla in Ballina admits killing them - but the jury will have to decide whether he is guilty of murder or manslaughter.
In opening the trial on behalf of the prosecution, Denis Vaughan-Buckley described the assaults on John and Tom Blaine as "vicious".
Tom's body was found on the floor of his bedroom when their carer called to their home on July 10th 2013.
His brother John, also known as Jack, was found in a small yard at the back of the house.
Both had been badly beaten and Jack had also been scalded when a hot liquid was poured over him while he was in a seated position.
The post-mortem was not able to establish at what stage that happened.
Mr Cawley was arrested and initially denied any involvement, but later told gardaí he was sorry for all the torture he had put everyone through.
He admits killing the two bachelors, so the main issue to be decided is whether he is guilty of murder or the lesser charge of manslaughter.