PRIVATE.
Weren't you really, really young then? That sounds like child soldiering.
So Harlan's World is a literal world where you were sent, found your sister with the Yakuza which you were supposed to destroy. You didn't because that was your sister. You fell in with the Envoys because you'd both turned on your captors, until your sister screwed that up by ratting you out and getting the Envoys killed. From then on, you couldn't get legitimate work and had to keep your head down. I'm guessing jumping from sleeve to sleeve.
So they put you in the body of this cop's boyfriend (who was also a cop) to mess with her. I'm guessing she was getting in the way of someone's plans and they wanted to "teach her a lesson."