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 of Queensland police, for years. In this special Full Story investigation, Broken Trust can reveal exclusive new evidence in the case of Hannah Clarke and her children, a domestic and family violence homicide that made national headlines. The series looks at serious police failings in the lead-up to the murders that were overlooked by the coronial inquest and not investigated by homicide detectives