I think Mr Arar(and his wife/family) should be thankful that the U.S. didn't just keep him.

We've been trying to get Leonard Peltier back from them for decades.

Hypothetically speaking, when they come to me and say "He knows where your wife and kids are being held hostage, but we're going to have to torture him to get the answers". This would be where I take off my Mr. Niceguy hat!