is it illegal to for someone to make a fake facebook profile and what can I do about it?

[Sassy]

My cousin who is 15yrs old female has had 2 fake facebook profiles made using all of her identity. Her photographs and her personal details have been used in the fakes.
Whoever it is that has created these profiles has added some of their own things to her profile including some extra pictures posed in a provocotive manner which look very similar to my cousin but her face is not visible.
Also the age has been changed to make her older and her hometown has been changed.

I am extremely worried about this situation and we have reported this to facebook via the option button available but nothing has been done.
Is this a matter for the police?

There has to be something we can do to legally to either find out who has done this or remove the fake profiles from the site.
Please help.
the thing that worries me is the provocotive added pics. My cousin is a child still at 15yrs old.
this could be a man who has made this profile???
Should I be worried?