CREEPY PERSON ON FACEBOOK?!!?

[Because I say so.]

So one day i was really bored, i typed up my name on facebook, i clicked a profile with my same name, the profile picture was not a picture of me, but when i looked at the photos there was a picture of me and my friend! i have reported this person to facebook for stealing my profile picture but they haven't done anything. i sent them a message on fb telling them to remove that picture or i will report it to the police. she just said "ok ok" and then she sent me friend request? And then a while later i checked her pictures again and my picture WAS STILL THERE! um im really scared i have already deleted that picture from my profile but she still has it? what do it do?