Oranga Tamariki's CEO says there's been accountability within the child protection agency after a scathing review into the murder of Malachi Subecz.

The five-year-old whose mother was in jail was abused and killed by his carer last November, inspiring an investigation into the company.

A review released today found five critical gaps in monitoring, care and agency co-operation. Some key recommendations for change include mandatory reporting of abuse for any person tasked with child protection.

The CEO of Oranga Tamariki, Chappie Te Kani says he's owning the fact the agency didn't get it right.

"We did not do right by the whanau. They did everything right, they put Malachi at the centre of their decisions. They were concerned for him, they came to Oranga Tamariki and we could have, and we should have, done our critical job for him."

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