Anyway to find the real person behind abusive message in facebook.

It is probably someone your friend knows. Facebook does know every IP of a member. BUT they will not disclose that without a court order. From searching on the internet, I found this message, I hope it is useful for you. '[i]Any time you receive an email notification from Facebook, it will contain a header that looks something like this: X-Facebook: from zuckmail [192.168.13.37] That header contains the IP of the computer which INITIATED the request. Note that this is NOT part of the SMTP return path - it's hiding among all of the other headers like X-Mailer. If this person initiates any notifiable activities (wall posts, etc.) then you can get his current IP. I can verify that this technique works - I actually used it to track down a prankster using a Facebook account with a fake name. (I knew that he was a fellow student at my college but didn't know who. Given the IP address, a NetBIOS name lookup gave me the computer name, which I then traced to him.)[/i]' http://forum.whatismyip.com/f4/facebook-account-hacked-t179/

Hi. aasifaalamkhan. Welcome to myLot! All that I can tell you is to contact Facebook itself. I would report the message to Facebook and save every word that this message contains. Keep all messages and forward it to Facebook abuse. You also will need to block this person as well too. I am sorry that you are caught up into this jam. I hope that whomever is bothering you will stop.

Actually my friend faced the same problem too. Some unknown person messaged her writing abusive things and all those s**t. She was totally pissed. We tried hard to find who the guy was but couldn't. All we could do was report the person :/