The Australian Greens are still the only party in Australian politics that wants to get to the bottom of the then Australian Government's role regarding David Hicks and his time in the human rights black hole, Guantanamo Bay.

The Government and the Opposition both voted against a motion to conduct an independent inquiry into Mr Hicks' case, a call the Greens repeated today in recognition of the International Day in Support of Victims of Torture.

Greens' spokesperson for Legal Affairs, Senator Penny Wright, said it was unacceptable that Australians still did not know the nature of the then Government's involvement in Mr Hicks' case.

"Ten years on, we still have no answers from the Australian Government on Mr Hicks' case, how this breach of trust occurred and why," Senator Wright said.

"Guantanamo Bay was a human rights black hole and the circumstances surrounding Mr Hicks' detention there are a black spot on the record of the Australian Government.

"But this is not only about Mr Hicks. It is about our Government's role in protecting and upholding the rule of law and the fundamental rights of its citizens, including the right to a fair trial.

"The Greens have consistently been calling for better human rights protection in Australia. Today, as we look around the world and see Australian citizens subject to the legal systems of other nations, we have to be sure that our Government is prepared to stand up for and defend our human and legal rights, whoever or wherever, we are.

"In a country such as Australia, such a commitment must be absolutely non-negotiable."

Motion transcript can be found here.