A NSW man has been jailed for at least 15 years and nine months after he stabbed his neighbour to death in an act of "vigilante justice" as the victim sat on the front steps of his mother's home.
John Can Yavuz, 37, was found guilty by a jury in 2018 of murdering Charlie El-Azzi outside the Greenacre home in November 2015.
In the NSW Supreme Court on Friday, Justice David Davies jailed him for 21 years with a non-parole period of 15 years and nine months over the killing.
The court heard the fatal stabbing came after Mr El-Azzi assaulted Yavuz in an unprovoked attack, as Yavuz was sitting in a car with his girlfriend.
"The offender was entitled to feel a very deep sense of grievance ... not only because he had been seriously assaulted but also because he had been humiliated in front of his girlfriend," Justice Davies said.
However, the judge said it was difficult to understand why Yavuz engaged in "vigilante justice ... although it may have occurred because of his heightened state of arousal as a result of the assault upon him".
"While that may be an explanation, it can never be a justification for taking the law into his own hands in the way he did," Justice Davies said.
After the assault, Yavuz went home and grabbed a knife before standing outside Mr El-Azzi's mother's house and demanding he apologise, the court heard.
He also said he was going to kill him, the judge found.
When Mr El-Azzi didn't apologise, Yavuz ran towards the steps where he was sitting, pushed his mother out of the way and stabbed him in the chest.
Justice Davies said there was no doubt he was "out for vengeance" but he couldn't be satisfied he intended to kill.
He acknowledged Mr El-Azzi's family had been devastated by his death, after the court previously heard his grieving father had been robbed of his "zest for life".
Yavuz, who has been in custody since 2015, will be eligible for parole in August 2031.
Australian Associated Press