I got the same message left on my voice mail from same phone number, caller ID says Blackwood NJ. On my message the caller left his name as "James Caston", he spoke with an accent. I'd say the message was pre-recorded.
Someone who said he was named Scott Jordan and from the Legal Affairs Department of the US Treasury just called threatening to send me in jail for some unpaid taxes from 2010 - given the non professional behavior and threatening tone I suspected this is a scam which was confirmed when I saw other people having had almost the same experience