Hi and welcome to SR. I don't think that anyone here is qualified to tell you if you should turn you ex into the police or not, we don't know you or the situation.
What I will suggest is that you take a look at our Naranon forum. There you will read stories of people just like you. They will share their experience with you, that is the best way I feel to learn, share with others what they have done in similar situations.
__________________ I know more about how to live than I did yesterday, but not as much as I'll know tomorrow. Today, Ill learn something new~JFT, 1/27/06 The difference between a good day and a bad day, is about 2 days~Ann of SR