They called me saying the IRS had filed a lawsuit against me for tax fraud. They asked if if I had an attorney and I kept asking for more information. I was threatened with police arrest. I was then transferred to this guy's superior who identified himself as Jean Carter who kept asking if I had an attorney. He gave me this phone number to call him back.

The scammers had think (probably Indian) accents.

I believe this is the same scam was this one: http://800notes.com/Phone.aspx/1-202-650-5442

Beware, the IRS would never do this (they would email or send you snail mail first) so watch out for this scam.