Ex-VW chairman refuses to testify in German emissions probe

HAMBURG/BERLIN (Reuters) - Ex-Volkswagen Chairman Ferdinand Piech, who resigned after a showdown with former chief executive Martin Winterkorn, has refused to testify to German lawmakers investigating a possible government's role in the VW emissions scandal, according to his lawyer. Piech, also VW's former CEO who spearheaded the carmaker's global expansion, gave testimony to lawyers of U.S. law firm Jones Day last April and to German prosecutors in Braunschweig near VW's Wolfsburg headquarters