A woman who babysat the two girls who died in a hot car in southeast Queensland at the weekend claims authorities had been alerted about the family before.
Gina Mckenzie, who regularly looked after the girls, told news.com.au there had been previous complaints to authorities about the children's welfare.
"I know welfare had been called numerous times," she said.
Kerri-Ann Conley, 27, will face Brisbane Magistrates Court on Monday on two counts of murder. Photo / Supplied
The lifeless bodies of Darcey-Helen, 2, and Chloe-Ann, 1, were reportedly carried from their Logan home, south of Brisbane, soaking wet, after desperate attempts to revive and cool them about 1.35pm on Saturday.
She said she was the last person to see them about 8.30pm Friday.
Ms Mckenzie said authorities should have done more to help the family.
"I strongly believe they should have done much more," she said.
Family and friends of Ms Conley claim they made multiple attempts to alert the authorities to concerns they held for the two children.
"I know of four people that made reports to them and other agencies and nothing was done," a family member told The Courier-Mail.
"(They) just got told they would look into it and do a property check of who lived there."
Premier Annastacia Palaszczuk confirmed this morning that the family were known to the Department of Child Safety and said an investigation would now begin.
Kerri-Ann Conley did not appear in court today. Photo / Facebook
"My information is, yes, they had contact with Child Safety," she said.
Hetty Johnston, founder of child safety advocacy group Bravehearts, said government departments were chronically underfunded and unequipped to deal with the sheer number of child protection cases.
"This is a system totally broken," she told 7NEWS.
"Darcey had a contagious laugh and Chloe really, although they were 12 months apart, wasn't really that far behind Darcey. I think she learnt a lot off Darcey, mannerisms."
He said the pair giggled all the time and repeated everything others said.
"They were just two peas in a pod," he said.
Darcey and Chloe. Photo / Supplied
Neighbours, who have paid tribute to the "gorgeous little girls", said they saw them soaking wet.
"The police were carrying the girls out … their shirts were ripped open like they'd tried to save them," one woman, who did not want to be named, told The Sunday Mail.
9 News reports Ms Conley discovered the pair and rushed them inside in an attempt to cool their bodies.
It was claimed she desperately tried to splash water on them after finding them.
Neighbour Willow Dawes was visibly shocked by the distressing scenes.
"I came out when the ambulance pulled up and saw the children being brought out," she told the The Sunday Mail. "It's pretty upsetting and it was quite confronting."
One woman, who did not want to be named, said she knew the family and the "gorgeous little girls".
"They were always dressed beautifully and just happy little girls," she told the newspaper. "They were always out in the yard playing and they were always happy little girls, that's for sure. They were gorgeous little girls."
Queensland Police Detective Inspector Mark White said it was a very tragic incident.
"The two children exhibited signs of being exposed to extreme heat and that is forming the direction of our investigation," he said.
"We'll be speaking to quite a number of people to establish what was taken place."
A friend of the family described the girls as "two beautiful angels".
"Darcey had a very caring heart for her sister and us all and the most amazing cuddles and kisses, and just as any toddler does, she liked to see how far she would get with being a bit mischievous," she told The Courier-Mail.
Neighbours said the family had moved in as recently as six months ago.
