Flirting at what cost?... Fatal attraction!

This female added me via FB, posting pics and comments (which I didn't see until later). So I asked my bf if he knew the girl, he said yes. So I asked her if her posts were pertaining to me?!. She started laughing and going on about it's all a game (but soon after came out and said they were an item). I confronted him about her and he said they only texted each other every now and then, but nothing pertaining to a relationship! Long story short, I deleted and blocked her on FB and she continued to make fake profiles and send me messages and even talk to her real profile thru her fake one. The police was contacted after threats were made, & she is now in custody! She told everyone that they were an item but in a text message sent to him from her she made it clear that they weren't involved in anyway, & how she's meaning to do it to get back at him for whatever reason. I just look at this situation as a form of fatal attraction!