Total scam call from 301 771 9051. I didn't pick up but recorded voice msg was left. It repeated 3 times, a man with accent claimed was in regard to pending action ...US Treasury, something about federal criminal action and I could be brought before a "magistrate judge" or a "grand jury" and to call a #. Ended with something like hope you will cooperate and help us help you. Interesting that on June 24 I received call at 9:53 PM from a different # 302 380 3716 that was the SAME message complete with same accent, but that one just used "before a magistrate judge" (give away wasn't USA based) and did not mention grand jury. 2 different area codes and #'s, same calling scam.
False debt collector claiming attempt collect on back taxes and threatening litigation - report them directly to the IRS.
https://www.treasury.gov/tigta/