a former allianz se hedge fund manager who was charged with fraud over billions of dollars in investor losses thinks us prosecutors may have used his former lawyer to gain improper access to privileged information  something that can sink a criminal case if true gregoire tournant who was chief investment officer and colead portfolio manager of a group of allianz hedge funds that collapsed during pandemic market gyrations pleaded not guilty thursday in new york to five criminal charges including securities fraud and conspiracy to obstruct justice he’s accused of misleading investors who were seeking lowrisk assets