White & Case lawyers in Washington, backed by pro-business and criminal defense advocacy groups, are urging the U.S. Supreme Court to overturn an appeals court ruling that gave federal prosecutors access to foreign documents usually outside the reach of grand jury subpoenas.

U.S. Department of Justice prosecutors, investigating price-fixing in the liquid crystal display panel market, served grand jury subpoenas on four law firms involved in parallel civil and criminal proceedings in federal district court in San Francisco. The government wanted access to civil discovery, including hundreds of thousands of pages of transactional data, that entered the United States from companies overseas.