You nailed the recording/Call script. Same exact messages received in SF Bay Area today.

Saying to call immediately for federal criminal case.  help us help you

I got the exact same call and the same message

Go ahead and call them back. tell them what you think of their BS. Swear at them or whatever makes you feel good. Waste their time, like they did yours.
made me feel a whole lot better this morning.
they are in Fresno.....would not be that hard to find the address of the building they work from.....if someone is of that persuasion.

I called them back and asked for a manager stating that  I was going to report them to the Federal Trade Commission.  They hung up.