GardaÍ are investigating whether a 58-year-old grandad - who was allegedly knocked down by a close relative of his after shots were fired outside a house in Tallaght - had been involved in a " long-running and bitter dispute" with his killer, the Herald can reveal.
A major investigation into the death of Dan O'Reilly, which happened shortly after midnight on Monday, was continuing last night after the chief suspect in the case was released without charge from Tallaght garda station.
The hit-and-run suspect, who is a Tallaght man in his early 30s, is alleged to have driven a white Ford Transit van that hit and fatally injured Mr O'Reilly after he allegedly fired shots at a house connected to the suspect.
The Herald has learnt gardaí are investigating an earlier row in the Labre Park area of the capital between the suspect and Mr O'Reilly and a number of the victim's associates at a social gathering among some extended family members.
It is understood the suspect left the Labre Park area and travelled to his home in Tallaght, but was followed by Mr O'Reilly and his associates - in a dark-coloured hatchback car - who intended to attack him. Shots were fired at his home.
"A number of people, including young children, were present when this happened. It is suspected that the suspect left the scene and came back in a van and ran over the victim before fleeing," the source explained.
Gardaí yesterday continued to appeal for information, saying that they "are particularly interested in a dark-coloured hatchback car that was seen leaving the area around the time of these incidents".
Officers also said a file on the tragic case will be prepared for the DPP.
A video circulating on social media, and believed to have been filmed at the scene, shows shouting and screaming, and three loud bangs can be heard on it.
"We heard the bangs and thought they were bangers. They echoed off all the walls," said one resident.
"There was a woman screaming, too. It was clear there was something wrong, and down the road there was a crowd gathered to help the injured man.
"Someone said they heard a man had been run over," said another.