The chief suspect in the brutal killing of a pensioner was on bail in relation to a violent crime in the same area in 2016, it has emerged.
Anthony Timms was savagely beaten to death at his home in Rowlagh Green, Clondalkin, on Friday evening.
In a tragic twist of fate, the pensioner had been celebrating his 74th birthday in a nearby pub shortly before his death.
A row broke out between Mr Timms and the alleged attacker when the OAP returned home.
The row turned physical and Mr Timms fell to the floor.
The alleged attacker is thought to have then repeatedly kicked Mr Timms in the head.
A woman who was known to both men and who was in the house at the time of the assault begged the alleged attacker to stop.
The man eventually stopped kicking Mr Timms and went into another room.
However, it is believed he returned and began kicking Mr Timms in the head again, causing injuries that proved fatal.
Neighbours said they heard screams coming from the house during the assault.
Mr Timms's alleged attacker fled the scene on a bicycle and was gone by the time paramedics arrived.
The Herald has learned that the chief suspect - who was well-known to Mr Timms - is facing charges over a horrific crime in the Clondalkin area in 2016.
He also has previous convictions for burglary and public order offences.
On at least one other occasion, he was charged with producing a weapon while on a drinking binge.
Gardai received reports of a domestic dispute at Mr Timms's home shortly before 9pm.
Mr Timms, who had serious head injuries, was treated at the scene by paramedics from the Dublin Fire Brigade.
He was later taken to Tallaght Hospital, where he died a short while later.
Gardai are treating the incident as a domestic dispute and believe that an argument took place between the suspect and Mr Timms moments before the fatal assault happened.
On Saturday evening, a 47-year-old man was arrested in the Lucan area.
He was detained under Section Four of the Criminal Justice Act and brought to Lucan Garda Station.
Gardai had until last night to decide whether the suspect should be charged or released and a file sent to the DPP.
Despite being considered violent, he does not have known links to organised crime.
Gardai were last night attempting to establish the motive behind Mr Timms's violent death.
Neighbours described him as an "ordinary man" who liked to visit the local pub.
A post-mortem examination was due to be completed yesterday evening, the results of which will determine the course of the investigation.
This was scheduled to be carried out by the State Pathologist, Dr Marie Cassidy, at the city mortuary.
However, gardai are satisfied that Mr Timms was beaten and kicked to death. No weapons were found at the scene.
It is understood neighbours called gardai after they were alerted by the woman in Mr Timms's home.
Locals said the incident has left the victim's family devastated.
Distraught relatives of Mr Timms visited the scene on Friday night.
Senior gardai and detectives attended the scene due to the serious nature of the incident.
Mr Timms's house was cordoned off at the weekend to allow a forensic examination by the garda Technical Bureau.
Gardai have statements from witnesses after conducting door-to-door inquiries.
A garda spokesman said: "The scene has been preserved for a technical examination by the garda Technical Bureau.
"A post-mortem examination was scheduled to be carried out by the State Pathologist's Office at the city mortuary.
"Gardai wish to appeal to witnesses or to anyone who can assist with the investigation to contact the incident room at Ronanstown Garda Station on 01 6667700.
"Alternatively, they can call the Garda Confidential Telephone Line 1800 666 111 or any garda station."