Uhm. The logic of the draconian punishments was mainly to preclude reprisals - dead pimps beat up nobody.
There are less harsh things that would also help - for example, not automatically deporting the women in question, but instead having some sort of plan for putting their lives back together.
Re; trusting the police. This too, is an issue that can be fixed. Better training. Job-video-logging. It would cost very little to record everything that happens near a cop. Cameras and storage media are cheap, sticking the former on their uniforms and the latter on their belts would not cost much. And would take all element of "he said, she said" out of any disputes about their behavior. Which is better for the cops, and better for the citizens.