 According to a former employee, quoted in a United Nations report, one of his companies, Hyochade, acted as a front for extortion, state propaganda and surveillance of political opponents.The German ZDF network's investigative program "Kennzeichen D" has claimed that Kongulu participated in the siphoning off of the national wealth by helping to organize the secret movement of gold to Gambia during the 1990s.In April 1997, as forces led by Laurent-Désiré Kabila advanced towards Zaire's capital, Kinshasa, it is alleged that Kongulu Mobutu compiled a list of 500 of his father's opponents who were to be assassinated.