Easy 10 Points for an easy question?

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ok so a few days ago someone made a fake facebook account of me for the second time in a year. The first time they just edited pictures of me and put makeup on my face. (I am a man). I filed a police report but didnt think too much about it. This time they made it under my name and they are talking about my brothers wife (I dont talk to my brother and she is the reason why) and saying that she is dead even though she is not so I filed another police report. Now her family members who think I made the account are threatening me (they are not in America while I am). I reported the account 3 or 4 times on facebook and they have still not replied. I sent them emails telling them I would get a notarized statement and whatever else they wanted but I just want to know who did it. I also emailed the Chief of police in my area and he replied once telling me he was sorry and asking for the police report number. I gave him it 2 days ago and he didnt reply since. I sent him another email this morning and he still did not reply. What else can I do? Do you think they will eventually tell me who made the account? Thanks
Ok I have already created an account and added them and they have accepted me. I tried to send them a link that will trace their ip as soon as they opened it and I disguised it by shortening it so is looks like bit.ly.604 or something like that. They did not open it. I believe his wife is doing this to get us in a fight because she has nothing to do all day. If I am correct than she has no idea what she is doing with computers to find a proxy server and do that kind of stuff. How would I find their ip using command prompt though?
Yes I posted this question about 7 times so you might run into it again haha.