One of our “missions” books last year dealt with human trafficking. It followed the life of one girl who was sold by her uncle (in Mexico, I believe), to where she was a part of a group of prostitutes who made enough money to suit their pimps, or were punished severely. One girl got to the point where she didn’t care if she was punished or not, so they deliberately hooked her on cocaine in order to be able to control her. I can’t remember the details, but she was murdered later, and the pimp was caught as he attempted to dispose of her body. But without witnesses, they couldn’t do very much against him. This girl was persuaded to come forward. There’s a lot more to it than that; there were a couple of men who knew what was going on and were seeking for a way to stop at least this little piece of this traffic. This was not fiction.
Edit: the girls were eventually brought to the US, I think Arizona, where this particular ring was broken up.