A NSW prisoner has been jailed for another 30 years for murdering a cellmate by stomping on his head.
The Supreme Court heard 31-year-old Abraham Ryan Tangi was "extremely angry and agitated" when he attacked 24-year-old Zaydoun Al-Qaseer at John Morony Correctional Complex near Windsor on June 19, 2017.
Justice Stephen Rothman said the men argued before Tangi lured his fellow inmate into a cell while another prisoner held the door closed so no one else could enter.
The judge said Tangi was significantly larger and heavier than Al-Qaseer and stomped on his head at least twice, fracturing his skull and causing other serious injuries.
Justice Rothman said the attack was "opportunistic" and Tangi had a history of violent offending.
"The stomping was while the deceased was on the floor," he said.
"The offender has little or no insight into his offending or behaviour.
"There is no evidence of remorse or contrition."
He sentenced the offender to 30 years jail for the murder with a non-parole period of 22 years and six months.
Justice Rothman said Tangi's antisocial behaviour made him unsuitable for community service or intervention programs.
He said inmates were vulnerable in jail because they lived close together, so the sentence should act as a deterrent to others.
Justice Rothman said the offender's mother had been the only person to ever visit him in jail and those visits had stopped with the COVID-19 lockdown.
The court heard the offender had a troubled family life and was raised by his grandparents until the age of nine, when he was sent back to his parents.
It heard he may have had undiagnosed anxiety and depression as a child and his offending started at the age of 15, with shoplifting and stealing phones and wallets.
Justice Rothman said the offender had a good work ethic, however, and had held down jobs, at one stage moving to Melbourne to preach for the Mormon Church.
The offender appeared in court via video link.
