Bill Scherer has represented Douglas Von Allmen in matters predating the Rothstein litigation.

A wealthy investor in the Rothstein Ponzi scheme is suing his longtime attorney, Bill Scherer, over an alleged $20 million debt.

Douglas Von Allmen and his family claim Scherer's firm, Conrad & Scherer, approached them to borrow millions of dollars in February 2010. That was a few months after the collapse of attorney Scott Rothstein's $1.2 billion scam involving selling shares of fake settlements.