Caller says his name is Steve Martin from the U.S. Treasury and makes threats regarding lititgation

It is tax time and everyone seems to be getting these calls.  Steve seems to be behind a lot of them.  The Indian scammers like to use celebrity names.  Here is more on this scam and a link that you can report it to the real IRS:  http://www.irs.gov/uac/Newsroom/IRS-Warns-of-Pervasive-Telephone-Scam