Zachary Rolfe, the former Northern Territory police officer who shot and killed an Indigenous teenager, Kumanjayi Walker, has been back in the witness box. Rolfe was acquitted of Walker’s murder in 2022, but now he’s given new evidence in a coronial inquest into the death.  So, what do newly revealed text messages and evidence tell us about the culture inside the Northern Territory police? And where do the problems in that policing system lay? Today, contributor to The Saturday Paper, Anna Krien, on who Zachary Rolfe is and why his evidence could spark change in the NT.   Socials: Stay in touch with us on Twitter and Instagram Guest: Contributor to The Saturday Paper, Anna Krien