After forcing him to sign, they go through all his personal belongings, but it's okay, you see, because he did sign a consent form.
When I was in college, I had the great privilege of taking a course from a Hungarian gentleman who had been captured by the Russians at the end of WWII. He spent 5 years in a Siberian prison camp before being released. His cellmate, who DID sign a confession (after seeing his granddaugter being tortured) was never released. Zoltan's advice to his students was very simple: Never sign anything.
That would be hard to do under those circumstances,
but I bet signing didn't help that poor gentleman's granddaughter.
I don't know what I'd do if my granddaughter was being tortured, but in the case described here, I would have signed the form, with 2 slight modifications to my signature: