According to reports, a military judge will decide the admissibility of a Guantanamo Bay defendant's confessions at trial regarding his role in a soldier's death in Afghanistan.

The Canwest News Service and the Globe and Mail has reported that Omar Khadr, of Canada, at the age of 15 allegedly threw a grenade that fatally wounded Sgt. Chris Speer in a firefight in Afghanistan in 2002, an incident that led to his capture,.

The judge started hearing arguments on Wednesday regarding the confessions. The sides present wildly divergent cases. The prosecution says Khadr was happy and freely told U. S. agents about the al-Qaida leaders' roles and locations. The defense says Khadr was tortured and was forced to clean up his own excrement.

The news services said that prosecutors say a plea deal in the war crimes case must include prison terms of between 25 and 40 years. (With Inputs from Agencies)