Australia cartel investigator says no impropriety in exchanges with JPMorgan lawyers

SYDNEY (Reuters) - An Australian antitrust investigator who helped bring criminal cartel charges against Citigroup Inc and Deutsche Bank AG denied acting with "impropriety" when presented with communications between the regulator and informants' lawyers.The court testimony from Australian Competition and Consumer Commission (ACCC) enforcement director Michael Taylor on Monday points to a defence strategy questioning the integrity of an investigation that ended in charges of collusion during a..