Khadr transferred to maximum-security prison in Canada.

ROUGH CUT (NO REPORTER NARRATION)

STORY: Canadian Omar Khadr, the youngest prisoner and last Westerner held in the Guantanamo military base, was sent to finish his sentence in his native Canada on Saturday, the Canadian government said.

Canadian Public Safety Minister Vic Toews said that Khadr, who was a 15-year-old fighting in Afghanistan when captured in 2002, had been flown from Guantanamo Bay, Cuba, to a military base in Trenton, Ontario and transferred to the province's Millhaven maximum-security prison.

Khadr's case has been controversial both in Canada and abroad given his age when he was captured, the nature of his detention and hearing, and the reluctance of Canadian officials to accept his return.

A U.S. war crimes tribunal in 2010 sentenced Khadr, now 26, to 40 years in prison, although he was expected to serve just a few more years under a deal that included his admission he was an al Qaeda conspirator who murdered a U.S. soldier.

Khadr pleaded guilty in 2010 to charges that included murdering American Army medic Christopher Speer with a grenade in a 2002 firefight, conspiring with al Qaeda to commit terrorist acts, making roadside bombs to target U.S. troops in Afghanistan, spying on American military convoys and providing material support for terrorism.

Khadr was the first person since World War Two to be prosecuted in a war crimes tribunal for acts committed as a juvenile. He was the youngest prisoner still at Guantanamo, but younger boys were previously held there.