The Supreme Court has rejected an appeal from a Canadian engineer who was caught up in the U.S. government’s secret transfer of terror suspects to other countries.

The Court did not comment today in ending Syrian-born Maher Arar’s quest to sue top U.S. officials, including former Attorney General John Ashcroft. Arar says he was mistaken for a terrorist when he was changing planes in New York on his way home to Canada, a year after the 2001 terrorist attacks. He was instead sent to Syria, where he claims he was tortured.