GSholtz, "Proven" is a strong word. As the investigation is ongoing, alleged is a better term.
The corruption rumors surfaced in January when an Iraqi newspaper published a list of about 270 prominent figures from more than 46 countries, saying they received oil money from Saddam Hussein's regime.
Top vote getters are Russia and France. Russia was the biggest oil buyer, France handled the money.
Follow the money and find the corruption. Several very close to Chiraq are alleged to have received vouchers for oil worth many tens of millions.