Former Spector Gadon & Rosen attorney Gomer Thomas Williams III pleaded guilty Monday in federal court to one count of wire fraud related to his theft of more than $500,000 from some of his former firm’s trusts and estates clients.

Williams, 54, was charged in an information by the U.S. Attorney’s Office for the Eastern District of Pennsylvania with stealing $503,361 from four clients through his role as either trustee or administrator of those clients’ trusts or estates, according to the information, which also alleged Williams overbilled clients. The alleged theft took place between 2007 and 2012.