Bosses at French banking giant Societe Generale were aware of the activities of “rogue trader” Jerome Kerviel, a top detective working on the case reportedly told an investigating judge, according to France24. The French investigative news website, Mediapart, quoted Nathalie Le Roy as telling judge Roger Le Loire she was “certain” that Kerviel’s superiors “could not have been unaware” he was taking wildly risky bets on derivatives.