A 53-year-old woman was suffering from a mental disorder when she stabbed a man to death in her Dublin home almost three years ago, the Central Criminal Court has heard.

Grace Miano, of Tudor Lawns in Foxrock, has pleaded not guilty by reason of insanity to the murder of 27-year-old Limbani 'Robert' Mzoma, who was originally from Malawi.

The jury heard she admitted killing Mr Mzoma. She told a garda she had planned to get him very drunk and that she had attacked him with a poker.

Senior Counsel James Dwyer said there would be no dispute over the evidence from psychiatrists that Grace Miano was suffering from a schizoaffective disorder at the time she killed Mr Mzoma.

He said she did not know what she was doing was wrong and was unable to refrain from her actions.

He said the evidence would be that Ms Miano was cooking in the kitchen after 11pm on the night of 1 November 2018 when two friends of Mr Mzoma arrived at the house.

Limbani 'Robert' Mzoma was fatally stabbed in south Dublin

She told them she had a drip in their friend and that she was a good doctor. She said their friend was in the sitting room in a Halloween costume.

The men called gardaí who found the deceased man lying on his back, naked from the waist down. He had suffered multiple injuries.

The post-mortem examination found he had died from traumatic injuries and had been acutely intoxicated at the time.

Items including a large blood-stained axe, a poker and a number of knives were recovered at the scene.

Ms Miano told gardaí at the scene she had been raped by a man she saw walking out of the house. She later said she had been raped by the victim.

She told a garda she had planned to get him very drunk, that she had attacked him with a poker and also mutilated him.

Gardaí found the deceased man lying on his back in the house

To find Ms Miano not guilty by reason of insanity, the jury must hear expert evidence from psychiatrists.

They must be satisfied that she was suffering from a mental disorder and did not know what she was doing, or did not know that it was wrong or was unable to stop herself.

Ms Miano told gardaí that she had killed Mr Mzoma to protect women, to protect herself and also to protect Prince William, a member of the British royal family.

In interviews she told gardaí that other people had told her to finish him off and that she had seen Jesus emerge from a hole.

The trial was briefly adjourned during the opening speech when one juror became distressed. When the jury returned, the juror indicated he was happy to continue.

Mr Justice Paul McDermott said he was conscious that the details of this case were very difficult and some of the evidence would be graphic.

He said he would bear in mind that the jurors had not been expecting to hear this kind of detail and he would facilitate any breaks they needed.

The trial is expected to last two to three days.