Claimed to be the IRS and that they had a warrant for my arrest. I called them back and they said they would get my case officer to call me back momentarily. I got a call 2 seconds later from someone named Cheryl Park claiming to be an IRS officer, badge # 640015 and Case # IR877106. They were quite smart about their line of questioning and eventually forwarded me to a manager who badgered me further about tax evasion. They never actually asked for anything, so it was tough for me to determine it was a scam until I read that the IRS never calls to discuss your taxes. They will only send you letters. Don't waste 15 minutes of your day on this BS.