Don't trust them :o)
There is various cops versions.
The Good Cop: "How about you talk, and we'll get you some better food and rights?"
The Bad cop: "My partner plays by the book. I don't. If you want your month to stay intact, make it talk!"
The Nietzchean cop: "There is no universal morality. Only will to power. And with that knowledge in mind, I have chosen to be an interrogator."