Same here....  This is the call I got.  

"Good afternoon this message is intended for Sam.  This is Federal Officer Roger Gibson and I'm calling you from Federal crime enforcement department and the nature off my call is in reference to a federal case in the complaint which has been filed on your name and on your identity. So make sure I need an immediate call back from you on my department number and the number to reach me that is area code 6467571389. I repeat the number once again that is area code 6467571389. So make sure I need an immediate call back from you on my number or else the situation badly enforced on you. Please and thank you and best of luck for your case in the system but they've. Goodbye."

This is such a fraud and not sure how they can get away with these type of frauds.  

Received a call this morning from 646-757-1389. Man with a thick accent - not sure if Indian or Chinese. Claimed he was calling from the Criminal Investigation Department. Got my name and address wrong. When I asked him about his department and officer number etc., he said he couldn't give me this information because I wasn't the correct person. He also had my location wrong (wrong state) as I have a VoIP phone with an out of state number. Said, "How is that possible? Your number is from Michigan. Is this your cell phone? What's VoIP?" Too easily distracted and random for a real officer of the law. I called him back on the 646 number in 5 minutes after quickly reading some of the reports on it online and he became confrontational and started using foul language. At this time, I hung up. I can't believe somebody can get away with an act like this. How hard is it for police to track down a cellphone? This guy should be apprehended before he seriously damages an innocent victim.

Got call from this. I had similar call 1 month back by a "FBI agent"... I knew it was fraud so told him not to call again... Then got call today by 646 numbr... I can tell they are fraud so i hung up.. The call me back and caller id read 911...i didnt answer so he left foul msg... Someone must do somethinf about this idiots.

got the similar call from the same number and mentioned about tax form 61 was not filed and the arrest warrant is issued. Such a BS call.

Same story as above. Some bozo with a Indian accent called - stating he is a IRS agent and I should to go local Rite Aid. Kind of creepy. Talked to Police, they didn't care about registering a case.