Human rights defenders in Australia are calling for an end to imprisoning people secretly.

Australia keeps the identity of such a prisoner secret by threatening the relatives and friends who know about per disappearance.

A trial held in secret is likely to be an unfair trial. That is true in Australia just as in the UK, Belarus, or China.

There is no reason to suppose that "Witness J" really broke an Australian law, or that perse did not have an overriding justification for doing so, as Witness K had.