I suspect the Russians will do a bit more than pull some underwear over his head.
You don't want to know what the Russian police do to guys like this. They will give you one chance to tell your story. Then they beat you till you drop. They come back an hour or two later...and give you a second chance. Then they have various options from letting other prisoners beat you...to medical procedures. This guy would love to be back in Guantanamo with Sgt Billy and his underwear game...he'd love to eat rice crispies...he'd appreciate morning prayer services....he'd love to have fresh clothing brought out a couple times a week. But thats history...and now...things are a little bit harsh.