The UN Committee aganst Torture ruled that Canada violated the Convention against Torture in deporting Sogi Singh on 2 July 2006. Sogi was deported from Canada as a suspected threat to "national security" on the basis of secret information under section 86 of the Immigration and Refugee Protection Act. He was released from prison in India for lack of evidence : the secret "evidence" on which Canada deported him apparently wasn't very convincing.

The UN concluded that Canada violated sections 3 and 22 of the CAT with the
deportation of Sogi.  The decision is here.