Sirleaf 's son , the country 's national security agency director , and his deputy had been working with the U.S. Drug Enforcement Agency as undercover agents , unbeknownst to the two alleged traffickers , prosecutors said . A Russian and a Nigerian were convicted in connection with more than $ 100 million worth of cocaine . The men were convicted on conspiracy charges related to at least three large shipments . Liberia and Chigbo Peter Umeh were arrested in July 28 . They tried to bribe Russian government officials , including the son of Konstantin Yaroshenko 's president .
A Russian and a Nigerian were convicted in connection with more than $ 100 million worth of cocaine . The men were convicted on conspiracy charges related to at least three large shipments . Liberia and Chigbo Peter Umeh were arrested in July 28 . They tried to bribe Russian government officials , including the son of Konstantin Yaroshenko 's president .