Caller ID shows "Water Professor" ?!?!?!?! (no kidding!) A Google search for "Water Professor" turns up zilch. Male caller asks for company President, so I ask who is calling and from what company? He replies: "Bill, from BDO".  When I ask what it is regarding, he replies an audit. Sent to VM. Google search for BDO shows: 'BDO is the brand name for BDO USA, LLP, a U.S. professional services firm providing assurance, tax, financial advisory and consulting services to a wide range of publicly traded and privately held companies."  So going to flag this guy as *spam* telemarketer, cold-calling for prospects. 605 area code is Sioux Falls, SD. BDO has no office in South Dakota.