A high-ranking employee warned senior Volkswagen managers in May 2014 that U.S. regulators might examine car engine software as part of an investigation into pollution levels, two sources familiar with the matter told Reuters.
The warning came in the form of a letter, which was sent more than a year before the German carmaker's public admission that its cars had been equipped with software to manipulate emission test results, the sources said, raising questions about how much senior managers knew about the scandal.
The U.S. Justice Department is suing the company for up to $46 billion for alleged violations of environmental law while regulators and prosecutors are looking to establish what role, if any, had been played by senior managers, including former Chief Executive Martin Winterkorn.