I think that somehow Kofi will be able to ride this out only because if any aspect of these investigations result in any legal trouble for him his term as Secretary General will probably run out before the court date(s).
Koffi will get immunity, take his money, and run. Just like Yeltsin, he'll leave rich and not care when it crashes and burns after he's gone. Koffi will retire to a Carribbean island, drink margaritas with the dancing girls, and this time 3 years from now, it will be like all this never happened.