Danny Talbot's family were in tears as the Bunbury District Court played back the CCTV footage which showed an assault that led to his death.
Carey Park resident Joshua Ainsley Kelly, 27, was sentenced on February 27, 2020 after admitting to throwing the punch that killed the 56-year-old Brunswick man.
Kelly had previously pleaded guilty to one count each of assault occasioning death and assault occasioning bodily harm.
State prosecutor Brett Tooker told the court that Mr Talbot, his son (19), and one of his daughters (22) visited Fitzgerald's Irish Bar on the night of May 24, 2019.
The court heard how Kelly and three other accused - Gregory Humphries, Jonathon Humphries, and Kirk Angus Boyce - entered the premises between 11.35pm and 11.41pm.
Mr Talbot and Gregory Humphries engaged in an altercation at 11.58pm.
Mr Tooker said Mr Talbot and his children were seeking to hire a taxi outside the bar on Victoria Street when Kelly and the other three men spotted them at 2.03am on May 25.
The court heard how a brawl ensued in the middle of the street and Kelly punched Mr Talbot in the jaw, leading to the 56-year-old hitting his head on the pavement.
Kelly also attacked Mr Talbot's son during the ordeal.
The prosecution's argument was supported by CCTV footage which captured the entire brawl.
Paramedics rushed Mr Talbot to Bunbury Regional Hospital for treatment. He was then flown to Royal Perth Hospital, where he was later pronounced dead.
Later that day, Kelly, Gregory Humphries, Jonathon Humphries, and Mr Boyce were arrested by police at a residence in Carey Park.
The court heard that Mr Talbot had suffered subdural haemorrhages, a Contrecoup brain injury, and a fractured skull.
Mr Tooker described Kelly and the three co-accused as the "aggressors" in the incident.
The prosecution said Kelly "showed no remorse", "did not go to Mr Talbot's aid", and "did not wait for police or paramedics to arrive".
He added that the 27-year-old should be given an "immediate and lengthy term of imprisonment".
"The state submits that the discount for a plea of guilty should be less than 25 per cent," he said.
The court was told that Mr Talbot's family recently received a written apology from Kelly.
Defence counsel Neville Barber told the court his client had shown profound remorse for his actions.
According to Mr Barber, Kelly has accepted that the family's anguish will "likely travel with them for the remainder of their lives".
Mr Barber added that Kelly has since ceased his alcohol consumption, and was taking steps to make better decisions and protect his family.
The court heard that the 27-year-old has a partner and a small child, with another due in May.
The pre-sentence report stated that Kelly did not remember hitting the victim or anyone else.
Judge Simon Stone described the incident as a "senseless and violent attack in the main street of Bunbury", adding that Kelly had played a "leading role" in Mr Talbot's death.
"No sentence that I impose can adequately reflect the value of the life lost," he said.
"The case against you is strong...the CCTV footage captured the entirety of your offending, and that of your brothers and others.
"It was a coward's punch, Mr Kelly."
The judge, however, also acknowledged the 27-year-old's personal circumstances, his written apology, his references, and his early pleas of guilty.
Kelly was given a six-year, eight-month term of imprisonment, and made eligible for parole.
Gregory Humphries, Jonathon Humphries, and Mr Boyce are scheduled to face trial on December 7, 2020.
