He was dressed in a T-shirt and jeans at Cross’s funeral home on Lower Gerald Griffin Street as a prison van pulled up with Nathan Killeen.
Murder accused Killeen, 24. is on trial at the Special Criminal Court in Dublin.
The body of his mother, Susan, 55, was recovered from a canal last week.
Ger Dundon had left the country after being released from Wheatfield Prison in January last.
In recent days he flew into Shannon where he met with the man now regarded as head of the McCarthy-Dundon gang.
Following the meeting the 26-year-old took a return flight to Britain.
Dundon had been released from prison last January after serving a five-year sentence for violent disorder which involved extortion against a night club operator.
When Dundon left Wheatfield last January he was picked up by a dark coloured BMW X5.
There was speculation he would return to Limerick and take over the running of the McCarthy-Dundon’s operations.
However, the Shannon sighting was the first in this country since.
The man he met in Shannon was a cousin and regarded as the brains behind the gang. He has maintained a low profile in recent years having returned from London where he served over five years in jail for a gun offence.
He was arrested with three others recently and questioned about a serious assault in Limerick.
He is known to have a wide range of criminal contacts in Britain and on the continent.
Gardaí also believe he ordered one of the most notorious murders ever carried out during the McCarthy-Dundons reign of terror in Limerick.
He is under constant surveillance and was observed at Shannon in recent days where he met with Ger Dundon.
The meeting has heightened Garda concerns the gang may be planning to regroup and re-establish their dominant role in the drugs trade in Limerick.
Ger Dundon has almost 100 convictions for serious crime.
One of his brothers, who has no criminal record, lives in London where the brothers were brought up before they moved to Limerick in their early teens.