Federal opposition MPs came together Wednesday to call on the Conservative government to immediately begin repatriating Omar Khadr, the last Western citizen still detained at the U.S. naval base prison in Guantanamo Bay, Cuba.

Omar Khadr, seen in 2002, faces charges of murder in the death of an American medic in a grenade attack. (Canadian Press)

The Toronto-born man has languished in the detention facility since he was captured by American forces in 2002 following a bloody firefight in Afghanistan. He is charged with murder in the death of the U.S. medic during the battle.

Opposition parties have renewed their pressure on Prime Minister Stephen Harper's minority government to push for Khadr's release in anticipation of the facility's closure when U.S. president-elect Barack Obama takes office in late January.

Obama has called for the closure of the controversial detention centre on the shores of Guantanamo Bay where the U.S. houses terrorism suspects.

Members of the New Democratic, Liberal and Bloc Québécois parties said they want the government to immediately begin the process of repatriation of Khadr to face trial at home rather than waiting for the conclusion of his trial by the U.S. military commission set to begin in January.

"[Harper has] been very firm in ignoring this issue, but the time for ignoring is over and the clock has run out for Mr. Harper," said NDP MP Paul Dewar. "We hope that the clock hasn't run out for Mr. Khadr."

Dewar said he plans to reintroduce a motion at the House of Commons foreign affairs committee to demand immediate government action on the Khadr case. His previous motion was sidelined when the federal election was called.

Liberal MP and foreign affairs critic Bryon Wilfert said the government needs to start thinking about where Khadr will go if the detention facility is shuttered.

"We know that the whole Guantanamo fiasco has been denounced by American legislators, by lawyers in the United States. It's being closed down, and yet still the Harper government says we don't want to take any responsibility for this individual," said Wilfert.

Dewar notes that other Western nations such as Australia and Britain have successfully negotiated the return of their citizens to face trial in their home countries.

Dewar noted that the Supreme Court of Canada concluded in May that Khadr's detention at Guantanamo Bay violated basic human rights.

Khadr's lawyers argue he should be rehabilitated, since he was a child soldier at the time of the alleged crimes.

U.S. officials allege that Khadr, at the age of 15, lobbed a hand grenade that killed an American army medic, Sgt. Christopher Speer, during the battle outside of Khost, located near the Pakistan border.

Khadr, now 22, is scheduled to stand trial on charges of war crimes and murder on Jan. 26, six days after Obama's inauguration.

Bin Laden's driver sent to serve time in Yemen

Also Wednesday, another Guantanamo detainee, Osama bin Laden's former driver, arrived in his home country of Yemen where he will serve the remainder of his sentence after being convicted in the U.S. war crimes court.

In August, Salim Hamdan became the first prisoner from the military base to be convicted in a full trial of the widely criticized military tribunals set up under U.S. President George W. Bush's administration to try non-Americans on terrorism charges outside the regular civilian and military courts.

Hamdan was sentenced to 66 months in prison, less time served at Guantanamo. He has 32 days remaining in his sentence.

With files from the Associated Press