A human rights lawyer says Australia's government is responsible for the latest death of a refugee on Papua New Guinea's Manus Island.
Hamed Shamshiripour's body was found hanging on Monday this week. He is the fifth detainee to die on Manus.
George Newhouse, from the National Justice Project, is acting on behalf of the family in Iran and says they want justice for a man Australian authorities knew was troubled by mental illness while in their care.
Mr Newhouse told Dominic Godfrey the family wants those who knew about Hamed's illness and vulnerabilities, but did nothing, to be held accountable.