Child Molesters, Child Abuse Effects: Bulimia, Eating Disorders, Addictions

The investigation stems from the ombudsman's recent inquiry into the abuse of children in care.

The foster parents allegedly abused a female in their care eight years ago.

A spokeswoman for the group, Denise Cripps, says she has been told by the Child Protection Agency that it is looking into the placement.

However, Ms Cripps says protocols obviously have not been followed.

She says it is evidence once again that supports a royal commission.

"We continue to call for a state inquiry into child sexual abuse...we would prefer of course a royal commission, an Australian royal commission, federal royal commission into child sexual abuse so that we are all following the same protocols, so that we all are aligned throughout the states and territories throughout Australia," she said.

Meanwhile, Greens justice spokesman Nick McKim says this case is symptomatic of the inadequate way the State Government has handled some aspects of child protection.

"Clearly the Government needs to investigate not only this particular matter, but it needs to cast its net a lot wider," he said.

"We need to know whether there are other people in the same situation who have been placed with carers who have been alleged to have abused children in the past."