Fake profile harassing me?

[LostSoul]

Back in October someone made a fake Facebook account and was harassing me posting very mean and hateful things on my boyfriends wall about me and messaging me saying that I should kill myself and so on. I'm trying to get someone to find out who it is and I was wondering whether you think it's too late to report it to the police if I do find out who it was. I think people like this should be held responsible for their actions especially when I almost acted on committing and I know this happens all the time to people everywhere Just looking for your input. Thanks.