Federal prosecutors say Giffen, a New York investment banker who became an official in Kazakhstan's government, cemented his power by bribing Kazakh leaders with $84 million that Amoco Corp., Mobil Oil Co., Phillips Petroleum Co. and Texaco Inc. paid to win access to Kazakh fields. In January, Giffen goes on trial in federal district court in New York in one of the largest overseas criminal bribery cases ever.
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