Australia is responsible for Hamed Shamshiripour

Dear Prime Minister,

Why was Hamed Shamshiripour prevented from going home to Iran despite making at least four requests?
Why have his claims of death threats not been investigated?
Why hasn't there been a full inquest into his death?
Why did Australia not provide psychiatric care for Hamed Shamshiripour despite both the ABF chief medical officer and the Australian High Commission in Port Moresby receiving urgent requests from Mr Ronnie Knight, MP?
Which Australian official decided to prevent Hamed Shamshiripour's body from being returned to his family in Iran for burial? Is it, as they claim, to prevent them from taking legal action against Australia to try to find out what happened?

How does any of this comply with Australia's obligations under the UN Refugee Convention?