The rising rates of rangatahi (Māori youth) suicide are among the highest in the world, and provide one of the starkest social and health disparities that exist between Māori and non-Māori. This research will focus on building relationships with whānau affected by suicide, people with lived experience of suicide, and suicide prevention services. We will co-design a programme with whānau to understand the extent to which their voices are heard in coronial investigations into rangatahi suicide. We will analyse these stories to understand how whānau can be involved in coronial processes and contribute to suicide prevention. The findings of this Research Activation Grant will contribute to policy adjustments in health and justice to enhance delivery of Māori suicide prevention and postvention initiatives. This project will inform the design of a project grant application to examine the multiple roles of people and agencies involved in coronial investigations and their contribution to rangatahi suicide prevention.