William "Bill" Shannon Lerach (born March 14, 1946, Ohio River Valley, Midwestern United States) is a disbarred lawyer who specialized in private Securities Class Action lawsuits. The $7.12 billion he obtained as the lead plaintiff's attorney in the case against Enron is currently the largest sum ever recovered in a group of securities class-action lawsuits in U.S. history. In 2007 he pleaded guilty to obstruction of justice and was sentenced to two years imprisonment. In 2009 he was disbarred from practicing law in California. As part of the settlement, Lerach would not cooperate as a witness and his law firm would be protected from any further prosecution. Over the course of his career, Lerach recovered upward of $45 billion on behalf of defrauded investors.