Here's an automated transcription of the robocall:
Hi my name is David Gray. This message is intended to contact you regarding an enforcement action executed by the United States treasury and needing your serious attention. Ignoring this will be an intentional second attempt to avoid initial appearance before magistrate judge for a grand-jury for federal criminal offense. My number is 606-259-9417. I repeat it's 606-259-9417. I'd like you to call with us and help us to help you.
As the others noted, male, middle eastern accent, serious, almost threatening tone. This is the second of these types of scam calls I received. I actually got a live person on the last one, and he threatened me - said he was an "officer". I hung up and he called back, again threatening. I said to hold on, as I was going to conference in the police so we could get this straightened out - of course, he disconnected immediately.
Got the second call. Called back using a *67 first to hide my number. They answered the phone as "Treasury Dept." I asked what kind of scam they were running Fellow hung up immediately.
Received two calls within two hours from David Gray and I was to call him back because he could help because I might have to appear before a magistrate or the "grand jury " for a federal enforcement matter. No answer when I returned the call.
Turned the tables. Said would not go buy green dot card. Was not going to make it that easy to scam me. "Oh no ma this is to help you get $5,000.00 dollar refund" I have continued to call they every hour on the hour. Will continue to call until I get tired.
Same apparently bogus message as the people listing above. Threatening tone and mentions and enforcement action by the US Treasury... intending your serious. Federal Criminal Offense.... tries to throw out enough legal "junk" to scare people.... none of the terms seem to be related to each other. Called twice today.
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