On the first business day after the news , Volkswagen 's stock price declined 20 % and declined another 17 % the following day , the same day a social media advertisement with '' Wired '' about " how diesel was re-engineered " was removed as well as a series of YouTube ads titled " Diesel Old Wives ’ Tales " . On Wednesday , 23 September , Volkswagen chief executive officer Martin Winterkorn resigned . Volkswagen hired Kirkland & Ellis law firm for defense , the same firm that defended BP during the Deepwater Horizon oil spill
Deepwater Horizon oil spill
Deepwater Horizon oil spill
Volkswagen