The families of three Indigenous children murdered in the small NSW town of Bowraville wrote to the state attorney-general more than a year ago and are yet to receive a response.
Attorney-General Mark Speakman said the families had been through a "heartbreaking" ordeal during the last 30 years, but added it was unlikely they would receive a reply any time soon.
"I can only apologise that we haven't had a response by now," Mr Speakman told a budget estimates hearing on Wednesday.