He told police he found his wife in her car, seriously injured and bound with clothesline, and investigators were unable to say who attacked her.
On Friday, Ms Brown’s family and friends, some holding “Justice for Ashlee” signs, celebrated as Naddaf had his appeal against the length of his sentence refused by the Court of Appeal.
Ashlee’s mother Siobhann Brown said she was “very happy” with the court’s decision, but there was more to be done to get justice for other victims of family violence.
“Our Ashlee can fully rest in peace,” she told reporters.
“We must continue to raise awareness and educate as many people as we can on this sadly rapidly growing horror we have come to know as domestic violence.
“She’s up there and now she can rest. I hope she’s proud … that she knows we pushed as much as we could.”
Naddaf, aged in his early 40s, told police he found his injured wife in her car and tried to care for her, but she begged him not to call triple-zero out of fear the Department of Health and Human Services would remove their children.
A post-mortem examination found Ms Brown suffered multiple blunt force trauma injuries and was repeatedly stabbed in the legs. Some of her wounds were infected when paramedics arrived.
In 2018, Supreme Court Justice John Champion told Naddaf his wife would likely have survived had he sought help.
“All it would have taken for you to summon assistance was to make a phone call, and it was likely that she would have then survived,” he said.
Instead, Naddaf’s failure to get help meant Ms Brown’s death was slow and miserable.
“I regard those efforts as pathetically weak compared to the level of care she clearly needed,” Justice Champion said of Naddaf’s attempts to care for her.
“You treated her with a gross lack of respect in circumstances where she was your partner, where she was vulnerable and in need of care and you had a duty to care for her.”
The Court of Appeal agreed with the sentencing judge’s assessment and found while the jail term imposed was stern, it was not excessive.
Adam Cooper joined The Age in 2011 after a decade with AAP. Email or tweet Adam with your news tips.