I received a call, the beginning of which was broken off, but the rest of the message said something about calling the number back before I have the "federal claims courthouse" call me or before I get arrested??

I received the same call on May 31, 2016. The message left on my voice mail said they were from the IRS and I am being charged with tax fraud and for me to call this number to have this settled out of court and before I was arrested.  Of course I laughed because the IRS WILL NOT call anyone. They do business through the mail or by certified letter. These scammers have a lot of nerve. They truly need to be stopped.