A 20-year-old man will appear before court tomorrow in connection with the death of Dale Creighton.
Mr Creighton (20) was attacked at 4am on New Year's Day and subsequently died from his injuries in hospital today.
Eight arrests have been made throughout the course of the investigation.
Graham Palmer (24) and Aisling Burke (20) both had their cases adjourned for two weeks at Dublin District Court where they appeared, charged with violent disorder in relation to an incident in Tallaght.
Three more men were arrested this evening.
Another male (27), who was previously detained, has been released swithout charge.
The alleged victim of an attack, Dale Creighton (20) was confirmed to have died from his injuries shortly before the conclusion of today's court proceedings.
He had been in a critical condition in hospital since an attack in the early hours of yesterday morning.
Mr Palmer, with an address at Homelawn Road and Ms Burke of Bolbrook Grove, both in Tallaght are charged with violent disorder at a footbridge at the Tallaght Bypass on January 1 last. The alleged offence is under the Public Order Act. The court heard further serious charges were being considered by the prosecution.
During the bail hearing, gardai alleged that Mr Palmer, a father-of-one, was seen on CCTV striking Mr Creighton and that Ms Burke, who also has one young child, was present throughout the incident. Gardai also maintain that Mr Palmer had Mr Creighton's blood on his hands and face when apprehended, and Ms Burke had it on her shoes.
The defendants were both granted bail by Judge Michael Walsh and remanded to appear in court again on January 16.
The court heard they were both charged in the early hours of this morning at Tallaght Garda Station and made no reply after caution.
Gardai objected to bail on grounds including the seriousness of the charges and the strength of proposed evidence against the accused.
They also feared the accused might interfere with witnesses.
Garda Jennifer Brogan said it would be alleged that Mr Palmer was seen on CCTV striking the injured party, fled the scene and was found with blood which is believed to be the victim's on his face and hands. There was a maximum term of 10 years in prison on conviction for violent disorder, she said.
"He was caught red-handed", she alleged.
Garda Alan Young said in evidence that Ms Burke was also seen on CCTV and was present throughout the incident. She was pursued and found with blood on her shoes that was also believed to be the injured party's, Garda Young alleged.
Both gardai said discarded items such as clothing, phones and weapons were being sought and it was possible the accused knew where they were located.
Defence Solicitor John O'Leary said his clients were prepared to obey bail conditions and enjoyed a presumption of innocence.
Judge Walsh granted bail in the defendants' own bonds of €750 each, with €300 cash lodgements required.
He also ordered independent sureties of €2,000, of which half was to be lodged in cash.
Conditions are that they reside at addresses provided to the court and stay out of the Tallaght area. They are to observe a curfew, sign on daily at their local garda stations and have no contact with witnesses or anyone else alleged to have been involved in the incident.
He remanded them in custody with consent to bail for several hours, but they were released when family members later stood as sureties. They are to appear in Dublin District Court again on January 16.
Mr Palmer, wearing a blue t-shirt with a pink Nike logo and blue jeans, and Ms Burke, dressed in a black jacket and white shirt, addressed the court only to confirm that they understood the bail conditions. Judge Walsh granted them legal aid after hearing they were unemployed and it was Mr Palmer's "New Year's resolution" to get a job.