A retired probation officer has filed a claim to the Waitangi Tribunal saying the Crown has failed to reduce the number of Maori in prison.
Tom Hemopo said he had the support of two Hawkes Bay iwi entities, Ngati Kahungunu Iwi Incorporated and Ngati Pahauwera Development Trust.
Mr Hemopo, announcing his legal action through law firm Braithwaite & Smail Limited, said half of all men and 63 per cent of all women in prison were Maori.
His claim targets the Department of Corrections and alleges no "high level" commitment has been made to reduce the number of Maori in prison.
In 2013 Corrections let its Maori Strategic Plan lapse without any consultation with Maori and since then it has had no strategy to address Maori reoffending, Mr Hemopo said.