Ben Smee, Guardian Australia’s Queensland correspondent, has been reporting on the national crisis of domestic and family violence, as well as the culture and attitudes inside the Queensland police, for years. In the final episode of this special Full Story investigation, Broken trust looks at how police are failing to learn from their own mistakes. Guardian Australia can reveal allegations from a former senior Queensland detective who has accused police of covering up their own failures in cases in which vulnerable women died after seeking police protection, and alleges she was ordered to ‘protect the organisation’s reputation at all costs’