Courtney Comstock
What has happened is, some percentage of foreclosures were probably legitimate foreclosures, but the letter of law was not followed because the system wasn't designed to handle the amount of volume of foreclosures that occured, and banks, lawfirms, etc cut corners.
http://www.businessinsider.com/hedge-fund-manager-whitney-tilson-explains-foreclosure-gate-in-one-sentence-2010-10