By Hamish Cardwell and Te Aniwa Hurihanganui, of RNZ.
Revelations of police in Masterton illegally photographing young Māori in the region have prompted a nationwide probe to be undertaken by the police watchdog.
The practice came to light after multiple reports by whānau describing their sons walking alone in broad daylight, when officers approach and insist on taking their picture.
There had been growing calls for a national investigation including from the Children's Commissioner, Wairarapa iwi and community lawyers.
Independent Police Conduct Authority (IPCA) chair Judge Colin Doherty said the authority would look at whether the practice was widespread.