djamena chad reject allegations make unite state president idriss deby pay million bribe exchange provide chinese energy company oil right without international competition unite state announce charge monday former hong kong home secretary chi ping patrick ho former senegalese foreign minister cheikh gadio allegedly funnel bribe high-level officials chad uganda government indignant question fierce attack head state chad government say statement late wednesday add deby always seek transparency country natural resources sectors u.s. justice department say gadio receive 400,000 ho via wire transfer new york act go-between bribe deby behalf unnamed energy firm headquarter shanghai neither ho gadio arrest last week comment publicly allegations landlocked chad pump 130,000 barrel oil per day rank third-from-bottom u.n. human development index 159th 176 countries transparency international corruption perceptions index chad reject u.s. bribery allegations president