former president Olusegun Obasanjo has alleged that a "cabal" surrounding late President Umaru Musa Yar'Adua framed corruption charges against his daughter, Iyabo when she was a senator in order to get back at him because of his personal views against them.
Source: http://www.ereporter.com.ng/index.php/national-news/item/2067-bukola-saraki-james-ibori-kingibe-others-framed-iyabo-for-corruption-obasanjo