GRAND RAPIDS (WKZO) -- The woman who headed up a mortgage document processing company is headed to federal prison for as long as 20 years.  Lorraine Brown pleaded guilty in federal court in Grand Rapids Monday to a racketeering charge for orchestrating a scheme of robo-signing, where the company signed thousands of mortgage documents for customers nationwide without actually reviewing the paperwork.  Brown headed up a company known as DocX, which was paid by the number of documents produced and has also pled guilty to similar charges in Missouri.