Called to say "second attempt to contact me for failing to appear in court" This is a total scam. Ignore! If you were in trouble with the feds, trust me, you would be contacted officially by mail or in person by law enforcement official.
Yet another number being used by Pakistan or India thieves calling themselves the U.S. Treasury Dept threatening prosecution if you don't pay their blackmail.
Total scam. If you were the subject of a grand jury investigation, you'd have found out about it from law enforcement by mail. Or by face-to-face contact with members of law enforcement. Ignore and block.
Called to say "second attempt to contact me for failing to appear in court" This is a total scam. Ignore! If you were in trouble with the feds, trust me, you would be contacted officially by mail or in person by law enforcement official.