How tough does a question have to be to kill?

I also had a former Iraqi general some of you may have heard of who was taken from my custody. I was told to keep him separated from the other noncombatants and give him everything he needs. If he asks for anything, hook him up, you know, take care of him, and don’t harass them. And I was like, well, I don’t need somebody to tell me to not harass somebody. He ended up—a soldier came up to me later and ended up telling me that, you know, hey, he died during questioning during his interrogation. And I’m thinking to myself, how tough does a question have to be to kill? I don’t know exactly what went on during his interrogation, but he was fine when I had him.

-Domingo Rosas. Sergeant with the U.S. Army 3rd Armored Cavalry Regiment, in Iraq from April 2003 to 2004

From his Winter Soldier: Iraq and Afghanistan testimony