Australia investigator in Citi cartel case learned of concerns from rival agency
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SYDNEY (Reuters) - An Australian investigator who helped bring criminal cartel charges against Citigroup Inc and Deutsche Bank AG said he first heard concerns about a stock issue they worked on from a rival regulator, but the agencies acted independently.The disclosure on Tuesday in a pre-trial court hearing relates to a central part of the defence against the country's biggest white collar criminal case: the investment banks want to show the evidence used to charge them was tainted by outside..