Let us consider the case of Osama bin laden

Why did it take so long to find him?
Probably because he took extraordinary efforts to protect his privacy

Why was he eventually found?
Because if you invest enough resources.
You can find almost anyone

I am not safe from torture of the FBI or Mexican drug lords because of any legal protection. I am safe by being so innocuous that no one really cares to find me.

And my guess is that joe Keegan will live out his life without being tortured by the us government for similar reasons. His main protection from the government is that he is inconsequential, rather than any sort of legal process that he may wish were in place to protect him. If a powerful person is determined to screw with you, the law is not much help even in the best case

"It's not a lie if you believe it." -- George Costanza
The whole problem with the world is that fools and fanatics are always so certain of themselves. --Bertrand Russel