I didn't answer. Caller left a lengthy message. He claimed to be with the Treasury Dept, & indicated I had a problem which required me to call them. Fat chance of that! The voice mail was of such poor quality that it was difficult to understand. I have received several of this type call lately. It appears to be a recent variant scammers are now trying.
This guy called a couple months back threatening if I didn't call back I'd go before a magistrate judge for a criminal offense....etc. He said his name was David Grey but had a distinct India accent. He called again this morning at 8:19am before I even got out of bed.