‘Litany of Mistakes’ and ‘Incompetency’ Before Baby Girl’s Death

The father of a baby girl who died aged just three months in Sydney’s west has claimed her mother smoked ice while her children “ran amok”.

The allegation today in court followed an admission yesterday by the NSW Department of Family and Community Services that it made “a litany of mistakes” in its handling of the at risk baby.

The three-month-old girl, known as “BLGN”, was found unresponsive in her cot at Oxley Park in 2014.

The inquest heard today that the mother and grandmother (pictured today above) of the dead three-month-old girl were regular ice users (AAP)

The mum was so hooked on ice she would go ten days straight without sleep said the father, who is now in jail, at today's inquest. (AAP)

The Glebe Coroner’s Court today heard FACS had received multiple reports about the welfare of her and her siblings between 2010 and 2014 but nothing was done.

The department closed their case due to “competing priorities”, the court heard.

“While FACS has thousands of dedicated people, these events show a litany of mistakes and in some cases incompetency,” counsel for FACS, Anne Horvath, told the coroner in an extraordinary admission.

The court heard the baby’s mother and grandmother were both regular ice users.

The father of BLGN, who is in jail, said his former girlfriend suffered a crippling ice addiction, which would keep her awake for 10 days straight while her kids were “running amok”.

“I’ve probably seen her smoke more times than I’ve seen her go to the toilet,” he told Glebe Coroners Court.

An inquest has heard NSW DFACS failures contributed to the death of the girl known as BLGN. (9NEWS)

“She would sleep until her next payday from Centrelink and then off she goes to her dealer.”

The father said he saw BLGN being fed from a bottle that was propped up with a blanket, and the baby being wedged between two pillows on the lounge to keep her in position, which he attributed to “laziness”.

Giving evidence via audio visual link, the father admitted he didn’t visit his daughter as much as he should have, but when he did the home was “a mess”.

The inquest will also look into the death of the girl's 19-day old sister. (9NEWS)

Police found a broken ice pipe on top of the baby’s bottle warmer while her older siblings were dirty and hungry.

“There’s never food in the house. (The mother’s) not getting up to make breakfast for anyone, let alone herself,” the man said.

The man said he was high on ice three days before BLGN’s death when he went to the mother’s unit with two other men, who smoked the drug in front of two older children.

The trio then left the house but the father said he later returned to the unit and stayed with his baby “until the sun came up”.

“I was laying down and she was resting on top of my heart and I sang to her ‘You Are My Sunshine’,” he said.

“That’s the last time I saw my daughter alive.”

The Coroner's Court today heard FACS received multiple reports about the welfare of the sisters between 2010 and 2014. (9NEWS)

It was during this time that he spotted an “Asian” bloke smoking ice in the family home.

“It was weird … he had his own little man cave in the non-messy part of the garage,” the father said.

But this evidence has since been denied by BLGN’s grandmother, who also blamed her own drug addiction for giving a different version of the events leading up to the child’s death.

The inquest has previously heard an Asian drug dealer who came to the house the night before the tragedy put his hands on the crying baby’s mouth to make her “shut up”.

The inquest will examine whether there was adequate care and supervision in the home.

Neighbours report hearing a baby crying hysterically in the hours before the little girl’s death.

The inquest is also investigating the death of the baby’s sister, known as DG, born more than a year later.

The 19-day-old also died in her sleep but had already been removed from the mother and was in the care of social services.

The cause of both deaths is still unknown.

The inquest will hear medical evidence later in the week from experts on sudden infant death syndrome (SIDS).