Dragos Nica, aged 30, of Mourne Park, Skerries, Co Dublin, has pleaded not guilty by reason of insanity to the murder of Michael Gannon, aged 55, at Mourne Park on November 14, 2013.
The court previously heard that on the evening of the attack, Mr Gannon was babysitting his daughter Jade’s two children and a neighbour’s child at Ms Gannon’s house in Mourne Park, next door to Mr Nica’s house.
Reading from a report, a consultant psychiatrist at the Central Mental Hospital, Francis John Kelly, yesterday told Jonathan Kilfeather, defending, at the Central Criminal Court that Mr Nica “struck” Mr Gannon over the chest with a knife.
Mr Kilfeather confirmed the accused believed he had been deliberately poisoned by Ms Gannon and that he was “freaked out”. He confirmed Mr Nica was certain he was going to die and that he first thought of killing Ms Gannon’s nine-year-old boy and five-year-old girl.
“He was in an agitated state,” said Mr Kilfeather. “He grabbed a bigger knife in addition to the knife he carried with him.
“He heard the door opening and struck Mr Gannon over the chest. As soon as the knife went in, the aura changed and the accused immediately went back to his house.”
The court heard that Mr Nica then rang the emergency services claiming he had stabbed someone.
Dr Kelly told Mr Kilfeather he believed Mr Nica could not control himself at the time of the offence.
“I don’t think he could control himself because of his state of mind at the time,” he said. He confirmed Mr Nica suffered from chronic paranoid schizophrenia characterised by delusions and false beliefs.
Under cross-examination by Patrick Treacy, prosecuting, Dr Kelly confirmed the accused had developed an emotional attachment with Ms Gannon and that he had had numerous sexual encounters with her.
The court heard Ms Gannon did not consider they were in a relationship but that the main factor responsible was Mr Nica’s psychosis rather than his being specifically focused on the relationship between him and Ms Gannon.
The trial continues.