Just got this call a little after 3pm.  They left a message (of course most scams don't).  So I said hmm...let's see what they have to say.  It was the infamous Federal Agent scam.  The message was broken (first 30 seconds or so didn't make the recorder - sure sign of an automated message), Synthesized and had no legitimate context.  Of course they did leave the message that they really have been trying and I better respond!