The man accused of murdering Detective Garda Adrian Donohoe has denied telling a key prosecution witness he is the most feared man in Ireland, his trial has heard.
Aaron Brady (29), who has pleaded not guilty to capital murder, was giving evidence for a fifth day at the Central Criminal Court.
Under cross-examination by prosecution counsel Brendan Grehan, he was asked about his notice of alibi and about evidence from two US-based witnesses.
Molly Staunton and Daniel Cahill have said that while living in New York they heard the accused admit to shooting a guard.
Ms Staunton said she was present in Mr Brady's apartment with two other men in the summer of 2016 when he said he had "murdered a cop".
Mr Brady accepted she was a truthful witness and agreed with aspects of her account, but said she was mistaken about him saying he had "shot a cop" and denied making any admissions.
He also said the word "cop" was not in his vocabulary and that he would use either "guard" or "police".
"The fact is I didn't shoot Adrian Donohoe, I didn't shoot anybody," he said.
He told the jury he recalled the incident in the apartment, saying he was angry because two gardai had called to his wife's parent's home in Tralee, Co Kerry, and "blackened" him.
Counsel also asked Mr Brady if he told Ms Staunton he was "the most feared man in Ireland".
The accused laughed when this was put to him, saying: "I definitely didn't say that, that's ridiculous."
He described Ms Staunton as a "nice girl", but she was "mistaken on a lot of things".
Mr Brady also said she was "vulnerable", and described the interruption by a male while she gave her evidence via video link from a house in New York as "disgraceful".
He was then asked about the evidence of Mr Cahill, who said that on three occasions he heard the accused admit to shooting a garda.
Mr Brady accepted he was in a fight at the Bronx bar where Mr Cahill worked and he had a scar after being punched in the face.
However, he denied saying he threatened to shoot the man who assaulted him and that he had shot a garda in Ireland.
He also said he was not alone with Mr Cahill in the toilet, cleaning his eye after the fight, and told the jury his friend was also in the bathroom.
He told Mr Grehan "if someone hit you and you were with your friends", they would come to your aid.
Mr Brady repeatedly denied the conversations with Mr Cahill and described him as "a liar" and a "psychopath."
Mr Grehan put it to the accused that a psychopath is someone with "no morality, no empathy, that blames others, manipulates others and lies to get out of any situation, playing the victim", and suggested Mr Brady "look closer to home".
The trial will continue before the jury of six men and seven women on Monday.
Mr Brady has pleaded not guilty to the capital murder of Adrian Donohoe (41), who was then a member of An Garda Siochana, at Lordship Credit Union in Bellurgan, Dundalk, Co Louth, on January 25, 2013.
The accused, of New Road, Crossmaglen, Co Armagh, also denies stealing €7,000 in cash and assorted cheques from Pat Bellew at the same location on the same date.