There are rules on torture in the BVD, but nothing on one of its logical conclusions: brainwashing/corruption.
I don't think torture does either of those things IRL, more the reverse - GETTING people to torture other people is a good way to desensitise them and get them to commit worse crimes. Even threatening them with pain in order to get them to hurt other people doesn't seem to work nearly as well as rewards, or peer group pressure. Hurting people per se can get them to say what you want them to say while they're in your power, but doesn't brainwash or corrupt them.
Of course it may be this is a fantasy trope you want, even if it has no real-life basis.