Appeals court rules against Ashcroft in 9/11 case

The exact ramifications of the ruling were not immediately clear, but at a minimum it casts a negative spotlight on the Bush administration's practice of detaining Muslim men earlier this decade at a time when the nation was still on edge after Sept. 11.

"It's a very big ruling, because qualified immunity is ordinarily a very robust form of protection," said Richard Seamon, a professor at the University of Idaho College of Law and a former assistant to the U.S. Solicitor General. "To overcome that immunity, you have to show that the defendant almost deliberately acted unconstitutionally to violate someone's rights — no innocent mistakes."