Victim's father outraged with ex-bikie killer's sentence

The family of an innocent man fatally bashed in Adelaide's north by a former Hell's Angels bikie is outraged the killer has been given the minimum sentence for murder.

Mark Boyce, 36, was ambushed and then attacked by three men just metres from his home at Elizabeth South in January 2017.

He suffered a shocking brain injury and died in hospital nine days later. Joshua Roy Grant was one of his attackers and was found guilty by a jury of murdering Mr Boyce.

In sentencing, Supreme Court Justice Tim Stanley said Grant and his co-offenders had intended to target another man but attacked Mr Boyce instead.

"The attack on Mr Boyce was savage, brutal and completely unjustified," Justice Stanley said.

"The utter pointlessness of his death can only accentuate the grief of those who knew and love him."

The judge accepted the 27-year-old didn't intend to kill Mr Boyce and didn't inflict the fatal blows but remained an active participant.

"You did nothing to stop the attack on Mr Boyce," he said.

Grant was given the minimum sentence for murder, and will be eligible for parole after serving 20 years behind bars.

The sentence outraging Mr Boyce's father Malcolm - who held back tears as he spoke outside court.

"Josh Grant and two of his accomplices took the life of my only son and that's a life sentence for me, so Josh's sentence will never, as far as I'm concerned, will never, ever be long enough," said Malcolm Boyce.

Police have vowed they will not give up in the hunt for the two other men who were involved in Mr Boyce's murder.

Mr Boyce's father hoping they will soon be arrested.

"It would put a closure to it to a certain extent," Malcolm Boyce added.

He said he would remember his son as a great mate.

"He was a character. Had a lot of friends and that goes to show at the funeral. He was a great mate to myself as well," he said.