A cloud of suspicion hanging over Volkswagen thickened, reports The New York Times, after a lawyer for a jailed former engineer said his client implicated top managers of the German carmaker’s Audi luxury brand in a continuing diesel cheating scandal. Statements and evidence provided to German investigators by the former head of thermodynamics in Audi’s engine development department suggest that knowledge of emissions fraud reached higher in the ranks of management than Volkswagen has admitted. No members of the company’s management board have been charged, although investigations are continuing.