Discharged bullets found at the scene of the fatal shooting of Gareth Hutch all came from the same handgun, the Special Criminal Court has heard.
A ballistics expert also told the three-judge, non-jury court that a second handgun discarded by the gunmen in the car park of the Dublin city flats complex had not been used.
Mr Hutch, 36, a nephew of Gerry "the Monk" Hutch, was shot dead as he was getting into his car outside Avondale House flats on North Cumberland Street in Dublin on the morning of 24 May 2016. He died as a result of four gunshot injuries.
Thomas Fox, 31, with an address at Rutland Court, Dublin 1, Regina Keogh, 41, from Avondale House, Cumberland Street North, Dublin 1 and Jonathan Keogh, 32, of Gloucester Place, Dublin 1, have pleaded not guilty to murdering Mr Hutch.
Mr Fox has also denied unlawfully possessing a Makarov 9mm handgun on 23 May 2016 at the same place.
Detective Garda Ursula Cummins, a ballistics expert with the Garda Technical Bureau, told prosecuting counsel Paul Burns that she examined the scene at Avondale House car park after the shooting where she found two semi-automatic Makarov 9mm handguns and discharged cartridge cases.
She said both handguns were of Russian origin with silencers attached and they had their serial numbers erased.
The witness said she took a number of wet and dry swabs from both handguns and the discharged cartridge cases.
The safety on the first handgun was not engaged, its magazine was empty and it had a capacity of eight rounds of ammunition, said Det Gda Cummins.
The witness said she examined the discharged cartridge cases and the discharged bullets, adding she was satisfied they were discharged from this firearm.
The second handgun was loaded with six rounds of ammunition and one of the rounds was removed from the breach. It had a magazine capacity of eight rounds and its safety was engaged, she said.
The witness testified that she took a number of swabs from various locations in the stairwell leading up to a flat belonging to key prosecution witness Mary McDonnell.
Det Gda Cummins said she also took a number of swabs from the exterior and interior of a black BMW car.
Navy waterproof pants, a waterproof jacket, a black balaclava, a navy baseball cap, a black Adidas hoodie with a zip, black Adidas bottoms, a neck warmer, navy waterproof pants and a navy "Arctic Storm" waterproof jacket were found in the car, she said.
It is the State's case that clothing in the BMW car can be linked to Mr Keogh.
Det Gda Cummins said she took swabs from a petrol can and a black spray paint cap that were found in the BMW. The windows of the BMW had been spray painted, she said.
The court previously heard that a black BMW car was parked in the car park of the flat complex on the day before the shooting. It is the State's case that Mr Keogh and another man, Mr AB, ran to the BMW and remained in it for a minute, but then abandoned it when it would not start and ran out of the flat complex.
Det Gda Cummins said she also took swabs from a white Ford transit van on 28 May as well as from a bottle of Milton sterilising fluid and a grey petrol can. It is the prosecution's case that Mr Fox was in this van on the morning of the shooting, but due to a change of plans the white van was not required.
Concluding her evidence, Det Gda Cummins said Mr Hutch was shot beside the black BMW car and all the bullets had been discharged from the same firearm and the second firearm had not been used.
At the opening of the trial, the prosecution told the court that the killing of Mr Hutch was not a spontaneous or spur of the moment act but a "brutal and callous murder". "It was premeditated and a significant amount of planning had gone into it," counsel said.
The prosecution said the three co-accused each had their own part to play in bringing about the death of Mr Hutch.
The prosecution contends that Mr Keogh threatened to kill Mr Hutch the evening before the shooting, that Mr Fox and Ms Keogh were instrumental in planning the murder, and Mr Keogh and another man, Mr AB, were the gunmen.
The trial continues before Mr Justice Tony Hunt, presiding, sitting with Judge Patricia Ryan and Judge Michael Walsh.
