Left voicemail to me by name. Said she was investigative officer with IRS advising me of a criminal claim against me. No address info, no case info. Advised that I needed to call her back or case would "forcefully" be taken to the court. Her name was Kim Solvot (sp?).
When I called back I got a message in a man's voice thanking me for calling, they are currently busy, please leave a message and they will call back. No identifying information at all.