A Canadian man who claimed he was secretly sent by the United States to Syria and was tortured has lost his last chance to sue former U.S. Attorney General John Ashcroft and other top officials.

The U.S. Supreme Court on Monday rejected Maher Arar’s petition for a writ of certiorari, ending his bid to hold officials accountable for his transfer to Syria, which was done based on erroneous information that linked Arar to al-Qaida.