The victim, who was named locally as Robert Ellis, 24, had attended a bonfire in Clondalkin and was later chased by a group of people across Neilstown Road. He ran into a house (not his own) in Liscarne Gardens, banging at the door for help.
However, his assailants followed him and he was killed in the back garden of the property.
The group of young people then fled the property over the back wall.
“We’re here today in respect of an incident that happened around 3am this [Tuesday] morning, where a young man was murdered in the backyard of a house.
“We have information that possibly four people left the garden over the wall,” said Superintendent Dermot Mann from Lucan garda station. “What we are looking for is anybody that can help us in respect of any direction of travel of those people,” he added.
Ellis, who had dozens of criminal convictions including drugs offences, survived a gun attack on his life last year.
His pregnant girlfriend was also shot at during the attack in 2015.
Gardaí who are investigating the Halloween night killing are trying to establish the victim’s movements during and after the bonfire.
“We understand that he may have been at a bonfire directly over here at St Marks at some stage during the night but we can’t say at what time that he left that area but we do believe that the deceased was at a bonfire at some stage that evening,” said Superintendent Mann.
Gardaí are unsure as to whether the victim had been assaulted at the bonfire or not.
“We have no information as of yet, but again that would be one of the lines of inquiry that we will be following up, if there were any altercations there,” said Superintendent Mann.
The killing has been condemned widely, with former Olympic boxer and Fine Gael councillor Kenneth Egan asking what the world was coming to.
Meanwhile, in Longford gardaí are appealing for the public’s assistance following a fatal stabbing of a man in the town yesterday morning. The victim was in his 30s.
“The incident occurred in the Great Water Street area of Longford at approximately 11.50am,” said a garda spokesperson yesterday afternoon.
Anyone with any information about either incident can call the Garda Confidential Line 1800-666-111 or any garda station.