You might know somebody is innocent but pressure can be put on them to use as an assett.
Wikileaks for backing up what is known with solid documentation is enemy number one for the US.
A number of British nationals and residents were held for years even though US authorities knew they were not Taliban or al-Qaida members. One Briton, Jamal al-Harith, was rendered to Guantánamo simply because he had been held in a Taliban prison and was thought to have knowledge of their interrogation techniques. The US military tried to hang on to another Briton, Binyam Mohamed, even after charges had been dropped and evidence emerged he had been tortured.
Expect more soon.