A MAN dubbed the Facebook killer after he posted "bout 2 kill ma' kid'' on the website as he drove around looking for a place to murder his two-year-old daughter has been jailed for life today with a minimum of 33 years.

Justice Elizabeth Curtain said Ramazan Acar breached a parent's most fundamental duty when he stabbed little Yazmina 'Mimi' in an attack she described as "chilling and horrific''.

The judge said the crime was in the worst category of murders because the victim was a child and the motive was revenge on Acar's former partner and the girl's mother, Rachelle D'Argent.

"More than that, the victim was your infant daughter, and she was killed by the one man in the world whose duty it was to love, nurture and protect her,'' Justice Curtain said.

"As such, your conduct was a fundamental breach of the trust that reposes between parent and child, a fundamental breach of a parent's most fundamental obligation.

"Further, you committed this murder for the worst possible motives - revenge and spite.

"You killed your daughter to get back at her mother. You used your daughter, an innocent victim, as the instrument of your overarching desire to inflict pain on your former partner.''

Ms D’Argent spoke tenderly to her dead daughter as she left the court holding a photo of Mimi.

"Mimi, it’s our day today,” she said.

“Mummy told you there would be justice for you.

“And even though I haven't accepted that you're not here, forever you'll be in my heart and I know you'll always be smiling down on all of us.

“My beautiful angel. Mummy and Mimi for life.”

As the sentence was read out, Acar stood impassively in the prisoner's dock in the Supreme Court as Ms D'Argent wept silently in the public benches.

Acar, 24, of Meadow Heights pleaded guilty to one count of murder committed on November 17 last year.

The judge said Acar was banned from seeing his daughter after a number of violent incidents where he abused and assaulted Ms D'Argent.

The couple had separated and reunited a number of times but the relationship finally ended after Acar was convicted of assaulting Ms D'Argent and making threats.

Justice Curtain said Acar persisted in contacting Ms D'Argent and eventually she relented and let him have the toddler for an overnight stay at his parent’s home which went well.

On the day Mimi was killed, Acar arrived at Ms D'Argent's Hallam home and asked to be allowed to take Mimi to a nearby milk bar. She never saw her daughter alive again.

The judge said he kidnapped the child and as he drove her around in his car he sent Ms D'Argent a series of bizarre texts and posted Facebook messages on what he planned to do.

In one Facebook message he said "bout 2 kill ma' kid'' and the judge said although he did not carry out the threat at that time it showed what he was planning to do and did do an hour or so later.

In one phone call he told Ms D'Argent: "I'm going to do it. Do you have any last words for her?''

Yazmina came on the phone and said to her mum "I love you'' and Ms D'Argent replied "I love you too''.

One text message to Ms D'Argent Acar said "It's ova I did it'', another said "I h8t you'' and a Facebook message read "Pay bk u slut''.

Acar told police: "She took that kid away from me and I went through hell. She won’t understand what I went through, like, I wanted her to feel it.''

Justice Curtain said the sentence had to have the effect of deterring people like Acar who wanted to use a child as a weapon to get back at a partner.

"Any sentence I impose must serve to specifically deter you from re-offending and must seek to deter like-minded members of the community so that they will know that life is sacrosanct and if they choose to act as you have done, they can expect stern and salutary punishment,'' the judge said.