German prosecutors confirm probe targeting VW's chairman

German prosecutors confirmed on Monday they are investigating Volkswagen AG's supervisory board chairman over suspected market manipulation, in another blow to efforts to contain fallout from the automaker's diesel emissions scandal. New questions also arose over findings by U.S. regulators about the extent of emissions test cheating by the automaker's Audi luxury brand. The confirmation by prosecutors in the German state of Brauchschweig came a day after the company said a probe announced in Ju