I called them back. They Answered "US Treasury Department". I asked where the office was located. She repeated US Treasury Department. I said again, where is this office located and she said "on your head" and hung up.
We got a call from this number today at 11:40 am and didn't answer. The caller ID was SAN JOSE CA. A voicemail message was left regarding some criminal offense concerning the US Treasury. When I called back (our number is hidden by default on outgoing messages), a male answered with "Thank you for calling the United States Treasury Department. How can I help you today?" The voices in the recording and of the person who answered both had a foreign accent. This is one of the most obvious scams I have encountered.