Called and left a threatening message from a terrible speaker phone saying ignoring him would be a federal criminal offence.

They kept calling, after a long time, there was a voice message that asked me to call them back, However, I couldn't pick up the details because it sounded like someone talking in a stadium hallway.

Call about "Federal Offence."  I will have to appear before a "Grand Jury."  If we have the phone number, why can't we break their legs and stuff them in their back pockets?

Scam call the police on them

I just got a call from them too saying they were going to send 5 police officers to my house to arrest me for tax fraud/federal offence if I didn't comply. What a total idiot. He hung up when I told him my business savvy husband would like to speak to him. I hate these people.