From whitepages.com: Indian scammer - claimed to be US Treasury (IRS). Don't want to talk with anyone other than the person they're looking for. IRS never call first - they only send letters. There're a lot of this Indian origin scams lately from Microsoft support and government agencies. Extremely aggressive.
Leaves message in heavily accented English that he is Adam Peterson from Treasury Dept. Have my lawyer call immediately or they will begin proceedings. Have a blessed day! Scam!
My wife received a call from these guys today. I got on the phone and was told to go to my bank and get $3,700 in cash and send it to them. Needless to say, I told him where to stick it and promptly hung up. He hasn't called back.