The Special Criminal Court has adjourned the trial of Patrick Hutch for the murder of David Byrne at the Regency Hotel in Dublin to allow the investigation into the death of the senior investigating officer to proceed.
Detective Superintendent Colm Fox was found dead at Ballymun Garda Station earlier this month.
Senior Counsel Sean Gillane handed in "notes authored by the late superintendent" at the start of proceedings this morning and asked the three judges to read them.
He then told the court that there was a separate investigation under way into the circumstances surrounding the death of Det Supt Fox and that having considered the matter, the prosecution felt it would be wise to allow that investigation to be completed before the murder trial.
Mr Gillane applied for the murder trial to be adjourned to enable him to advise the court how long the investigation into the detective's death might take.
"It would be wise to proceed that way," he told the judges.
Defence Counsel Michael O'Higgins said that both parties were proceeding "tentatively".
He said the prosecution wanted to "preserve its position in the trial" and said he was not objecting to the application.
Mr O’Higgins said he would make a submission at a later date as to whether or not the trial should be adjourned outright.
Mr Justice Tony Hunt said "in the circumstances" he would say no more and adjourned the case until 22 March.
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The prosecution claims that Patrick Hutch, from Champions Avenue in Dublin, was the man dressed as a woman carrying a gun on the day Mr Byrne was shot dead at the Regency Hotel in Dublin on 5 February 2016.
The 25-year-old denies charges of murder and related firearms offences.