The wife of Detective Garda Adrian Donohoe visited the scene to identify her husband's remains 90 minutes after he was shot dead, a court heard.
A colleague and close friend of the late detective gave evidence yesterday at the trial of Aaron Brady (28), who denies his murder.
Inspector Darren Kirwan told the jury at the Central Criminal Court he had known Det Gda Donohoe and his wife Caroline for 17 years.
He recalled being off-duty that night and being informed at 9.45pm that his colleague had been killed.
The court heard Insp Kirwan went to the home of Det Gda Donohoe a short time later and that Caroline Donohoe indicated she wished to visit the scene at Lordship Credit Union.
The witness agreed with prosecuting counsel Lorcan Staines SC that Ms Donohoe identified the body of her husband to him at 11pm.
The following afternoon, Insp Kirwan attended Our Lady of Lourdes Hospital, Drogheda, where he formally identified the body of Adrian Donohoe to Dr Khalid Jaber.
The 15-person jury was also told the cause of death was recorded as a penetrating shotgun wound to the face.
The post-mortem report from Deputy State Pathologist Dr Jaber was read out to the court by Jane Murphy BL.
Dr Jaber said he attended the scene at Lordship Credit Union and observed Det Gda Donohoe in a supine, or facing upwards, position.
He said there was an injury to the right side of his face and he was lying in a large pool of blood. Dr Jaber said in his opinion the deceased died "as a result of a gunshot wound to the face" that entered the right eye.
He also recorded a number of personal effects that were on Det Gda Donohoe, including a wedding band on his left ring finger, a notebook and a dark leather holder with ammunition cartridge and magazine clip inside.
The jury will continue hearing evidence on Monday in the trial of Mr Brady, who is charged with the capital murder of Det Gda Donohoe at the Lordship Credit Union in Bellurgan, Co Louth, on January 25, 2013.
Mr Brady is also charged with the robbery of approximately €7,000 in cash and assorted cheques from Pat Bellew at the same location on the same date.
The accused, of New Road, Crossmaglen, Co Armagh, has pleaded not guilty to both charges.
Yesterday, Garda Finbarr Gurrihy, of Dundalk garda station, gave evidence of being on patrol that night when a call for assistance was made over the radio by Detective Garda Joe Ryan.
The witness described Det Gda Ryan as having "panic" in his voice and that there was an urgency about the call.
Gda Gurrihy said while en-route to the scene with two colleagues they drove through Ballymascanlon and he was instinctively looking out for any suspicious vehicles but did not notice anything unusual.
He observed a number of vehicles in the car park and Det Gda Donohoe with a gunshot wound to his face.
Gda Gurrihy then sealed-off a scene from Bellurgan filling station.