Montreal Canadian officials appeared unmoved Tuesday by a grainy video showing a distraught teenager at the US military prison in Guantanamo Bay pleading with Canadian intelligence officers to take him home. 

Canadian Prime Minister Stephen Harper has maintained that his government will not seek Omar Khadr's return to Canada. 

Anne Howland, a spokeswoman for Foreign Affairs Minister David Emerson, said Tuesday that the government believes Khadr, who is facing a military tribunal in October at Guantanamo, is in "a legal process that must continue." 

The Toronto-born Khadr was 15 years old when he was captured by US forces in Afghanistan in 2002 following a fierce firefight that left him badly wounded. 

Now 21, he is the only Western prisoner left at Guantanamo and could face life in prison. The US government has charged him with murder for allegedly throwing a grenade that killed a US special forces medic. 

The seven-and-a-half-hour video of Khadr's questioning by Canadian security officials in 2003 is the first look inside interrogations at the controversial US prison. 

The formerly classified footage recorded over four days shows Khadr, then 16, at times friendly, at times defiant, and at one point absolutely devastated as he realizes that the Canadian officials are there not to help him but to pump him for information about his family's connections to the terrorist network al-Qaeda. 

At one point Khadr pulls off his orange prisoner shirt to show his chest and back wounds and pleads for help, saying they had not healed six months after his capture. 

Khadr complains that he cannot move his arms, saying he has not received proper medical attention, despite requests. 

"I'm not a doctor, but I think you're getting good medical care," the Canadian intelligence agent responds. 

"No, I'm not. You're not here (at Guantanamo)," says Khadr, almost crying. 

Khadr continues to complain of the lingering effects of the firefight in Afghanistan: "I lost my eyes. I lost my feet. Everything!" 

"No, you still have your eyes," the interrogator says, "and your feet are still at the end of your legs, you know." 

The agent, whose face is obscured for security reasons, later accuses Khadr of using his wounds and emotional state to avoid the interrogation. 

No, you dont care about me," Khadr says. 

As Khadr starts to weep uncontrollably, the interrogator calls for a break and leaves the room. 

Left alone, Khadr buries his face in his hands and calls out several times in haunting voice, "Ya ummi," which means "Oh Mommy!" in Arabic. 

"It's the cry of a desperate young man," said Dennis Edney, one of Khadr's two Canadian lawyers. "He expected the Canadian officials to take him home." 

Khadr's lawyers released the tapes Tuesday in hopes of generating sympathy for the young man and to pressure the Canadian government to demand Khadr's transfer to Canada before he is prosecuted for war crimes by the US special tribunal at Guantanamo. 

Khadr has denied the allegations against him and says his confession was extracted under torture at the US military base in Bagram, Afghanistan. 

Pentagon officials have denied that Khadr was mistreated, arguing that he "has been treated humanely." But secret Canadian government documents released under court orders appear to contradict that statement. 

A report by the Canadian Department of Foreign Affairs indicates that US military officials at Guantanamo kept Khadr in solitary confinement and interrupted his sleep patterns for three weeks to "soften him up" prior to interrogation by another Canadian intelligence officer in 2004. 

US government lawyers have indicated that the line between the sleep interruption and sleep deprivation ­considered a torture technique is "blurry." 

Khadr's lawyers hope that these revelations will shame Canadian authorities to finally demand his transfer to Canada. They argue that Khadr has to be treated like a child-soldier who was brainwashed by his own family to fight in a global jihad. 

Khadr and his two brothers were taken to Afghanistan by their father, Ahmed Said Khadr, an alleged al-Qaeda financier and close friend of terrorist leader Osama bin Laden. The elder Khadr was killed in fighting with Pakistani security forces in 2003. Khadr's brother, Abdullah Abdurahman, was injured in the same fighting but was eventually transferred to Canada, where he awaits extradition to the United States to face multiple terrorism charges. 

A middle brother, Abdurahman Khadr, was also a prisoner at Guantanamo, but was later freed and is the only one to have publicly denounced jihad. (dpa)