If it did and said nothing, or was complicit in the crimes by handing over prisoners without any guarantee that they would be treated humanely, then the government and the military leaders in Canada should be right up there beside the U.S. officials who condoned and carried out these crimes.
From Nat Hentoff at Village Voice:
History Will Not Absolve Us
Leaked Red Cross report sets up Bush team for international war-crimes trial
"If and when there's the equivalent of an international Nuremberg trial for the American perpetrators of crimes against humanity in Guantánamo, Iraq, Afghanistan, and the CIA's secret prisons, there will be mounds of evidence available from documented international reports by human-rights organizations, including an arm of the European parliament—as well as such deeply footnoted books as Stephen Grey's Ghost Plane: The True Story of the CIA Torture Program (St. Martin's Press) and Charlie Savage's just-published Takeover: The Return of the Imperial Presidency and the Subversion of American Democracy (Little, Brown).
"... [I]f we, the people, are ultimately condemned by a world court for our complicity and silence in these war crimes, we can always try to echo those Germans who claimed not to know what Hitler and his enforcers were doing. But in Nazi Germany, people had no way of insisting on finding out what happened to their disappeared neighbors.
"We, however, have the right and the power to insist that Congress discover and reveal the details of the torture and other brutalities that the CIA has been inflicting in our name on terrorism suspects."