This is the man facing trial, charged with the murder of David 'Daithi' Douglas, who was shot dead in a gangland attack in a Dublin shop in 2016.
Lee Canavan (31) was extradited from the UK on Tuesday and brought before Dublin District Court yesterday morning.
Judge John Hughes remanded him in custody, to appear in court again next week.
Mr Canavan, of no fixed address, is charged with murdering Mr Douglas (55) at Bridgefoot Street in Dublin's south inner city on July 1, 2016.
He is also accused of causing criminal damage to a car at Strand Road, Sandymount, on July 4 that year.
Mr Canavan is the fourth man to be charged over the killing of Mr Douglas, who was shot six times in front of his daughter.
Freddie Thompson was convicted by the Special Criminal Court and jailed for life for murder after a trial in August 2018.
Nathan Foley pleaded guilty in November 2018 to assisting a criminal organisation and received a six-year sentence.
Getaway car driver Gareth Brophy admitted helping to facilitate the murder and was jailed for 10 years in January this year.
Detective Sergeant Mark Kelly told Judge Hughes he arrested the accused at 4pm yesterday at Casement Aerodrome in Baldonnel, on foot of two warrants.
Mr Canavan was taken to Kevin Street Garda Station, where his reply to each charge after caution was "no comment", Det Sgt Kelly said.
He applied for the accused to be remanded in custody to appear in Cloverhill District Court on the next date.
Defence solicitor Tracy Horan said she anticipated that the book of evidence was ready and asked for the case to be put in to next Wednesday for the service of the book.
She said it was a matter that would be sent forward for trial to the Special Criminal Court and asked for her client to be remanded to Mountjoy Prison, rather than being sent to the Midlands Prison in Portlaoise.
"We have security arrangements in place and it makes sense for us to bring him directly from Mountjoy," Det Sgt Kelly agreed.
Ms Horan said given the "nature of this matter," all individuals involved were incarcerated in Mountjoy Prison.
Judge Hughes remanded him to Mountjoy, to appear in Cloverhill District Court on May 27.
He also recommended appropriate medical treatment for the accused. Ms Horan said her client required urgent medical attention in relation to a tumour.
The judge also granted free legal aid after hearing the accused was not working and of "no means".
No bail application was made as bail cannot be granted at district court level on a murder charge.
The accused, dressed in a navy tracksuit, was not required to address the court during the brief hearing and has not yet indicated how he intends to plead.
He was flown to Ireland on an Air Corps aircraft after a risk assessment by gardai deemed it would be "unsafe" for him to travel from London on a commercial flight.
Detectives from the Garda Extradition Unit travelled to arrest Mr Canavan at an RAF airbase in the UK and returned with him on the Irish military plane.