We monitor the case until their prison release and we ask our corrections colleagues to work through the parole system, so that when they're eligible for parole, we can engage with them again, long before they're released. We would know that we're not able to remove them. We don't hold them in detention.
If they're still liable for deportation, we would manage them in the community through a residence and reporting agreement, which is a lawful document that says “you must reside at this address and you must report to our officers at a period of time”.
For matters where it's a serious national security threat or they are a serious threat to the community, we may detain them, but in recent times, based on United Nations advice and human rights advice, where possible we will allow people to remain in the community, particularly if there is no prospect of deportation. Otherwise, essentially they are held in a corrections facility.
We don't have immigration detention, so they are held in jail with no prospect of release or no prospect of deportation. There have been some overseas court decisions and the United Nations frowns very heavily on this, and I think it's the right decision: I think we have to treat people in a fair and humane way.