Detective Sergeant John Mathieson is in his 26 year of service with the NZ Police. The vast majority of his career has been spent within the Criminal Investigation Branch, with many of these years spent working in the field of child abuse. He currently holds the position of Detective Sergeant in charge of the Major Incident Team (MIT) in the Counties Manukau Police District. He is responsible for overseeing all serious and acute child protection matters involving non - accidental injuries (NAI’s), mass allegations (MAI’s), medical neglect and child exploitation cases. John has, throughout his career, been involved in many complex and high profile non-accidental injury investigations, including a number of child homicides. He is based at Te Pou Herenga Waka, the Multi-Agency Centre in Manukau, co-located with Oranga Tamariki Clinical Services, Counties Manukau District Health Board (DHB) and Counselling Services.