She said those children deserved justice, and fellow New Zealanders "deserve to know what went on".
"This is the right thing to do and we need to urge our Government to do the right thing.
"By the 70 almost half of all kids in state care were Maori and a generation later more than half of our prison population are Maori adults: many of whom are former wards of the state," she said.
She also said people like to believe justice needs to be colour blind, but "the reality is that when you look at our prisons: ethnicity is its defining factor".
"Today Maori New Zealanders make up more than half of our total prison population, a damning indictment on a system that is many times more likely to arrest a young person if he is Maori. Maori girls and women are even more over-represented."