Oranga Tamariki has temporarily closed its Christchurch care and protection unit after a video was leaked.
The video shows a young person being surrounded by staff, tackled, restrained and held in a headlock.
Staff have since been stood down and Children's Minister Kelvin Davis admits the system is broken.
Chief executive Helen Leahy from Te Pūtahitanga o Te Waipounamu - a Māori advocacy group.
She spoke to Corin Dann.
