Maybe he needs it as leverage. Unfortunately in Kenya, you can't dismiss either allegation. He can be guilty and also be saying the truth about rigging.
The question is, if he was being absolutely honest about having proof (well,
alleged proof) that the elections were rigged, wouldn't CORD already grabbed onto this like a psychotic Bull Terrier?
My opinion is the guy was caught pants down with his grubby little hands in the cookie jar and is now playing the victim (as Kenyans we should long be used to this, starting from the tried and tested "money has been poured to finish me" to screaming "my life is in danger").