Message indicated that I should call back this number or else there would be federal charges. A magistrate or grand jury indictment.

I go the same message. Pretty sure we'd get certified mail or a knock on the door if it was legit. Scammers.

I get the same call. It is a scam. Do not call them back. I got a call a few days ago about the Microsoft computer virus. I told him I knew this was a scam and I was going report him to the police. He hung up.

Same as Ed... some robot voice left a message about being reported to a Federal Jury.  Whatever...

I just received the same call here in iowa I am not calling it back it has to be a scam.  I agree we would have received a certified letter from the US treasury.