Ruto's problem is a very simple one, but there's not much he can do about it at the moment; they've got him by the small ones. If you are a man, think of a gentle but firm grip on the family jewels and what a hard squeeze would feel like.
Certain people, using GoK machinery, collected the ICC evidence against him and also lined up the witnesses. Once Jubilee won, it was necessary that the witnesses suddenly "develop a conscience", "see the light", "recant and withdraw", etc. And that happened. But, if necessary, the witnesses can be made to go "in reverse" at any time, even if they have already testified. Also, the Kenyan courts could suddenly decide to make a final decision in the Barasa case and send him off to sing at the Hague.
So until the ICC case is concluded Ruto has to be a very good, well-behaved boy: If Uhuru is coming or going, be at JKIA and smile meekly; problems with teachers or whatever ... handle them; The Prince is hangover ... step up and attend the meetings; RV getting a stick up its whatever ...take it with a smile.