Karmah Jayne Hall, 14, took her own life in September at her foster parents’ property north-west of Sydney.
The family said authorities failed to keep Karmah safe and had kept them in the dark about her death ever since.
They were also alarmed that her foster father had been investigated over abuse allegations made by another foster child in his care.
Karmah was removed from her birth family’s care at 11 months of age because her father was violent towards her mother, Donna Rathborne.
“They came and literally tore her out of my arms, which to this day I won’t ever forget that feeling,” Ms Rathborne said.
Karmah Hall. Image via Facebook.
Ms Rathborne had access visits with her daughter over the years, but Karmah remained with the same foster family until she ended her life in a shed at their rural property in Kenthurst.
Karmah went missing on September 2 but her body was not discovered until three days later.
Ms Rathborne said her family learned about the death on Facebook.
“My daughter Kate rang me and said, ‘Mum, I’ve just seen on Facebook – Rest In Peace, Karmah,” Ms Rathborne said.
“I inboxed the young boy and he said, ‘I’m in Cairns and my mother just told me that Karmah committed suicide’.