Two men and a woman have been given life sentences after being found guilty at the Special Criminal Court of murdering Gareth Hutch in Dublin two years ago.
Jonathan Keogh, Thomas Fox and Regina Keogh had denied murdering Mr Hutch in May 2016, but were given the mandatory life sentences.
There was a heavy garda presence around the Special Criminal Court, with members of the Public Order Unit inside the courtroom, but there were no incidents.
Fox was also found guilty of the unlawful possession of a firearm.
Mr Hutch was shot four times as he was getting into his car outside the Avondale House flats complex on North Cumberland Street in Dublin on the morning of 24 May 2016.
He was the nephew of Gerry Hutch, known as 'The Monk'.
In the verdict for Jonathan Keogh, the presiding judge Mr Justice Tony Hunt, said the prosecution had proved beyond reasonable doubt that he was guilty as charged.
The judge said the court accepted the prosecution’s case that this was "not a spontaneous or reactive killing".
Mr Justice Hunt said the court was satisfied that Jonathan Keogh was the man who fired the shots in a "callous and cold-blooded manner" and that he had a hand in almost every aspect of the planning of the murder.
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Jonathan Keogh made no reaction when the guilty verdict was read out.
The prosecution contended that he was "instrumental" in planning the murder of Mr Hutch, as well as being the getaway driver.
It was the State's case that Fox was parked near Avondale House in a white Transit van on the morning of the shooting, but due to a change of plans the white van was not required.
Mr Justice Hunt, sitting with Judge Patricia Ryan and Judge Michael Walsh at the non-jury court, spent an hour reviewing the evidence that led to Fox's guilty verdicts.
It was the prosecution's case that 41-year-old Regina Keogh had been instrumental in the planning of the murder.
In delivering the verdict, Mr Justice Hunt said it was with reluctance that the court was convicting her of murder.
The judge said while she is a person of good character, the conviction was the result of her involvement in her brother's affairs.
Mr Justice Hunt said she had "colluded to provide intentional and substantial assistance" in the killing of Mr Hutch.