We got a call too. The IRS will never call the way this freak is calling and stating his reason. Told my wife that if this creep calls again, she should say "this call is being traced and will be turned over to the police". All traced calls do go to the police.
I got the same message that I was a primary suspect in an IRS INVESTIGATION. The call back number said box was fill call back later and hung up. It was from Seattle Washington. Is this legitimate?