Computer generated voice from a phone number registered as a cell phone:  "My name is Officer Marcus Brown and I am calling from the Criminal Investigation division of IRS.  The matter at this end is extremely time-sensitive and urgent. As after audit we found that there was a fraud and misconduct on your tax which you are hiding from the government.This needs to be rectified immediately so return the call as soon as you receive the call."  The IRS will NEVER contact you in this manner, EVER.  Do NOT call back.