You mean alleged cover up. Here is one of those that was found dead.
http://en.wikipedia.org/wiki/Yasser_Talal_Al_Zahrani
Captured at the age of 16, al-Zahrani was accused of being "a front line fighter for the Taliban", despite later revisions that stated he had never advanced past the "second line". He was also accused of arranging weapons purchases.
In 2006, he wrote a letter to his father while in detention, that suggested that two prisoners seemed to be on the verge of death, and that he suspected foul play. Ten days later, he and the two prisoners were all reported dead, ostensibly having hanged themselves with their bedsheets.
This doesn't sound like a guy that is going to commit suicide but of a guy who is fearful for his life and the lives of other prisoners. Also do you want to expand to secret CIA torture camps and how many SUSPECTED terrorists were taken to places where torture is legal?
http://en.wikipedia.org/wiki/Extraordinary_rendition
Why do you find this hard to beleive considering the CIA employs the world's biggest drug traffickers and assassins?
The only difference between the CIA and the mob is that the CIA is licensed to kill legally.