It is near impossible to salvage Ruto case [in say witness tampering] when OTP are concluding their case. Ruto and Sang will have to go the whole hog unless they win mid way..no-case to answer. Uhuru can only help him say financially (considering the money ruto is dishing out, that is not a problem) and maybe physiologically.
Ruto has box himself into a tight corner politically by his loyality and fawning; he need to demand medve-putin arrangment; otherwise he has to trust gema will stick to the deal.