Got a call from this number claiming call is from IRS

Today I Got a Call From 202-600-4634 he told his name is Cabin Peterson.He Told Me This Call From IRS center he told me today they get a Criminal Record Case Againest Me and He Told Me i need to find a IRS Lawyer Then i told him i no need a Lawyer And Cut off  My Cell Phone Line Then He Call Again With Same Number and Leave a voice message that i need to call back him again and need to talk with him about my Case ,He give same Number 202-600-4634 to cal back.
so what i need to do now?i don't have any idea.thanks

This is a scam!  You don't need to do anything, but go on with you life.

I have got couple of calls from this number too today
8/21/2012 asked what was the emp ID: he gave 23892
They are also prepared to say some number ha :

I just received  a call  about IRS. was a indian man , with weird  accent.
we should call the police and report this. I almost had a heart attack. since when IRS will call us and do that. all I know they always contact everyone by mail letters. be careful everyone!!!!